Asia · Sumatra: orangutans, Lake Toba & Pulau Weh

Indonesia

Trek to wild orangutans in the Leuser rainforest, climb a steaming volcano, swim in the world's largest crater lake, and dive off Pulau Weh.

☀️ Best monthsFeb, Mar, Jun, Jul
✈️ From Geneva20h–24h · 2 stops · from CHF 450
🗓️ Ideal length12–18 days
💰 Mid-range / dayCHF 60–100 pp
🛂 Swiss passportE-Visa on Arrival (e-VOA), IDR 500,000 (≈ CHF 27) for 30 days, extendable once by 30 days
Other versions of Indonesia: Komodo, Lombok & Flores (no Bali): dragons, mantas, turtles & beaches →

Overview

Why Indonesia?

Sumatra is Indonesia's wild side: huge, green and still off the main tourist trail. In the north, Bukit Lawang is one of the best places on Earth to see Sumatran orangutans in the wild, on a trek through the Gunung Leuser rainforest. The cool Karo highlands around Berastagi have active volcanoes you can climb at sunrise. Lake Toba, a supervolcano crater filled with water, is surrounded by Batak villages and is wonderfully relaxing. At the northern tip, Pulau Weh has coral reefs straight off the beach. It's cheap, friendly and adventurous, but not polished: roads are slow, English is limited and accommodation is simple. There's no self-driving here; everyone uses drivers and shared tourist cars.

Highlights

  • A two-day jungle trek to see orangutans in Gunung Leuser National Park (UNESCO)
  • River tubing back to Bukit Lawang after the trek
  • Sunrise on the steaming crater of Sibayak volcano
  • Lake Toba: swimming, Batak villages and total calm on Samosir island
  • The 120-m Sipiso-piso waterfall
  • Snorkelling and diving with turtles and reef sharks at Pulau Weh
  • Eating your way through Medan's Indian, Chinese and Batak food

Scorecard

How it rates

Tap a criterion to see why it got that score.

3.4
★★★★★★★★★★

Average of 20 criteria

Experiences

  • Food ★★★★★★★★★★

    Rich, spicy and varied: Padang food, rendang, Batak dishes, Acehnese curries and coffee, Medan's street food.

  • Sightseeing & culture ★★★★★★★★★★

    Batak villages and architecture, the tsunami memorials in Banda Aceh; nature comes first.

  • Nature ★★★★★★★★★★

    Rainforest, volcanoes, the huge Toba crater lake and coral reefs.

  • Beaches ★★★★★★★★★★

    Pulau Weh has lovely coves and reefs, but few sandy beaches.

  • Animals ★★★★★★★★★★

    Wild orangutans, gibbons, hornbills, and excellent marine life at Pulau Weh.

  • Sport & adventure ★★★★★★★★★★

    Jungle trekking, volcano hikes, river tubing, diving and snorkelling.

  • Nightlife ★★★★★★★★★★

    Very quiet; Aceh is dry (no alcohol).

  • Relaxation ★★★★★★★★★★

    Lake Toba and Pulau Weh are very relaxing; the trek and roads are not.

  • Variety ★★★★★★★★★★

    Jungle, highlands, a crater lake and a tropical island.

Getting there & around

  • Flight from Geneva ★★★★★★★★★★

    18–22 h with two connections (via Singapore or Kuala Lumpur).

  • Transport without a car ★★★★★★★★★★

    Private cars and shared tourist cars on slow, winding roads; long travel days.

  • Ease of travel ★★★★★★★★★★

    Little English outside guesthouses, basic infrastructure; Aceh has Islamic law.

  • Jet lag ★★★★★★★★★★

    +5 h (summer) / +6 h (winter).

  • Fits 10–14 days ★★★★★★★★★★

    10–14 days covers the north well; 2.5 weeks adds West Sumatra (Bukittinggi, Harau valley).

Comfort & practicalities

  • Value for money ★★★★★★★★★★

    Very cheap: guesthouses CHF 15–40, meals CHF 2–6, drivers CHF 50–90 a day.

  • Weather ★★★★★★★★★★

    Hot and humid with frequent showers; cooler in Berastagi and at Toba.

  • Safety ★★★★★★★★★★

    Friendly and safe for travellers; road safety and volcano/flood risks are the main issues.

  • Health ★★★★★★★★★★

    Dengue, some malaria risk in rural areas, rabies; basic hospitals outside Medan.

  • Accommodation ★★★★★★★★★★

    Simple guesthouses and eco-lodges; few comfortable hotels.

  • Crowds ★★★★★★★★★★

    Very few tourists; you often have the jungle, lake and reefs to yourselves.

When to go

Best time of the year

February–March and June–August are best. Avoid October–December, the wettest months, when floods and landslides can cut roads.

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
BestGoodMixedAvoid

Drier months · Jan – Mar & Jun – Aug

  • Best trekking conditions
  • Calmer seas for diving
  • Clearer views over Lake Toba
  • Still hot and humid, with the odd shower
  • Haze possible in July–August

Rainy season · Sep – Dec

  • Lush and green, very few tourists
  • Lower prices
  • Muddy, slippery trails
  • Floods and landslides (severe in late 2025)
  • Rougher ferry crossings

Getting there

Flights from Geneva

Fly to Medan Kualanamu (KNO) with two stops, usually via Singapore or Kuala Lumpur, 18–22 h in total. Return from Banda Aceh (BTJ) via Kuala Lumpur to avoid backtracking.

RoutingAirlineStopsTravel timeReturn, economy
GVA → ZRH → SIN → KNO SWISS / Singapore Airlines + Scoot / Singapore Airlines 2 18h–21h CHF 900–1400
GVA → DOH → KUL → KNO Qatar Airways + AirAsia / Batik Air 2 19h–23h CHF 800–1300
GVA → IST → KUL → KNO Turkish Airlines + AirAsia 2 19h–23h CHF 750–1200
BTJ → KUL → GVA (return)
One-way price for the return from Banda Aceh.
AirAsia + Qatar / Turkish / Emirates 2 20h–24h CHF 450–750

Itinerary

Day by day, without a car

Pick a trip length. Day 1 is arrival day and the last day is departure day; the overnight flights are extra. Each transfer lists every option, with the recommended one first.

Style:
Trip length:
Taxi / driverPlaneBoat

+ Pulau Weh

Finish with diving and snorkelling at the northern tip of Sumatra.

🧭 Explorer 6 bases · 6 moves

Bukit Lawang · 1 nightJungle camp (Gunung Leuser) · 1 nightBukit Lawang · 1 nightBerastagi · 2 nightsLake Toba (Tuk Tuk, Samosir) · 2 nightsMedan & Kualanamu airport · 1 nightPulau Weh (Iboih) · 3 nights
  1. Day 1

    Land in Medan · drive to the jungle

    Arrive at Kualanamu airport and go straight to Bukit Lawang with a driver (3.5–4 h). Dinner by the river.

    🧭 Medan & Kualanamu airport → Bukit Lawang: your options
    • Private car from Kualanamu airport Recommended
      ⏱ 3.5–4 h CHF 50–70 Comfort ★★★★★★★★★★
      Book: Your guesthouse or trekking guide
      Price per car (up to 4 people).
    • Shared tourist car (e.g. from Medan)
      ⏱ 4 h CHF 15–25 Comfort ★★★★★★★★★★
      Book: Your guesthouse
    • Public bus from Pinang Baris terminal
      ⏱ 4–5 h CHF 3–5 Comfort ★★★★★★★★★★
      Book: At the terminal
      Crowded and slow; you first need a taxi to the terminal.
    • River-view dinner

      Listen to the jungle; gibbons call at dawn.

    • 💡 Book your trek with a licensed guide (via your guesthouse or a known agency such as Sumatra Orangutan Explore).
    🛏️ Night: Bukit Lawang
  2. Day 2

    Jungle trek: orangutans (day 1)

    A 2-day trek in Gunung Leuser National Park with a licensed guide, looking for orangutans, Thomas leaf monkeys, gibbons and hornbills. Night in a river camp.

    • Two-day jungle trek

      Steep, muddy and unforgettable; with meals, camp and park fees. Never feed or touch the orangutans.

      ⏱ 2 days CHF 90–140
    • River camp

      Swim in the river, cook over a fire, and sleep under a tarp to the sound of the forest.

    • 💡 A one-day trek (CHF 45–60) also works if you don't want to camp.
    🛏️ Night: Jungle camp (Gunung Leuser)
  3. Day 3

    Tubing back to the village

    A last morning walk, then float back down the river on tied inner tubes.

    • River tubing

      Part of the trek: a fun ride through small rapids.

      ⏱ 1 h
    • Bat cave

      A short walk from the village to a cave with bats (bring a torch).

      ⏱ 1.5 h CHF 3–5
    🛏️ Night: Bukit Lawang
  4. Day 4

    Up to the Karo highlands

    A drive through plantations up to cool Berastagi, with a stop at the fruit market.

    🧭 Bukit Lawang → Berastagi: your options
    • Private car Recommended
      ⏱ 4–5 h CHF 60–90 Comfort ★★★★★★★★★★
      Book: Your guesthouse
      Price per car.
    • Shared tourist car
      ⏱ 4–5 h CHF 20–25 Comfort ★★★★★★★★★★
      Book: Your guesthouse
    • Berastagi fruit market

      Passion fruit, markisa juice and highland oranges.

    🛏️ Night: Berastagi
  5. Day 5

    Sunrise on Sibayak volcano

    An early climb up the steaming Sibayak volcano (2,212 m), then soak in the Semangat Gunung hot springs.

    • Sibayak sunrise hike

      3 h up from town (start at 4:30), fumaroles and views of Sinabung erupting in the distance.

      ⏱ 5–6 h CHF 20–35
    • Hot springs

      Sulphur pools at the foot of the volcano.

      ⏱ 2 h CHF 2–5
    • 💡 Take a guide: people have got lost on Sibayak in fog. Sinabung itself is off-limits.
    🛏️ Night: Berastagi
  6. Day 6

    To Lake Toba via Sipiso-piso

    Down to Lake Toba via the 120-m Sipiso-piso waterfall, then the ferry from Parapat to Tuk Tuk.

    🧭 Berastagi → Lake Toba (Tuk Tuk, Samosir): your options
    • Private car to Parapat + ferry to Tuk Tuk Recommended
      ⏱ 4 h + 45 min CHF 60–90 Comfort ★★★★★★★★★★
      Book: Your guesthouse
      Price per car; the ferry costs CHF 1–2 per person.
    • Shared tourist car + ferry
      ⏱ 5 h CHF 20–30 Comfort ★★★★★★★★★★
      Book: Your guesthouse
    • Sipiso-piso waterfall

      A waterfall dropping into a canyon at the lake's northern end.

      ⏱ 1 h CHF 1–2
    🛏️ Night: Lake Toba (Tuk Tuk, Samosir)
  7. Day 7

    Batak villages by scooter or bike

    A loop around the north of Samosir: the stone chairs of Ambarita, the royal tombs of Tomok, and Batak dances at Simanindo.

    • Ambarita stone chairs

      Where the Batak kings once held trials.

      ⏱ 1 h CHF 1–2
    • Tomok royal tomb & market

      Sarcophagi and souvenir stalls.

      ⏱ 1 h
    • Simanindo Batak dance

      Traditional dance and a museum in a king's house.

      ⏱ 1.5 h CHF 3–6
    • 💡 Rent a scooter (CHF 6–8/day) if you're confident, or hire a driver with scooter or car (CHF 25–40).
    🛏️ Night: Lake Toba (Tuk Tuk, Samosir)
  8. Day 8

    Back to Medan · food night

    Ferry and car back to Medan, and an evening eating your way around the city.

    🧭 Lake Toba (Tuk Tuk, Samosir) → Medan & Kualanamu airport: your options
    • Ferry + private car Recommended
      ⏱ 4.5–5 h CHF 70–100 Comfort ★★★★★★★★★★
      Book: Your guesthouse
    • Ferry + shared tourist car
      ⏱ 5–6 h CHF 15–25 Comfort ★★★★★★★★★★
      Book: Your guesthouse
    • Medan food walk

      Soto Medan, durian at Ucok Durian, and martabak at Merdeka Walk.

      CHF 10–20
    • Maimun Palace

      The Sultan of Deli's yellow palace.

      ⏱ 45 min CHF 1–2
    🛏️ Night: Medan & Kualanamu airport
  9. Day 9

    Fly to Aceh · ferry to Pulau Weh

    A short flight to Banda Aceh, a look at the tsunami memorials, then the fast ferry to Pulau Weh.

    🧭 Medan & Kualanamu airport → Banda Aceh: your options
    • Kualanamu → Banda Aceh Recommended
      ⏱ 1 h CHF 50–120 🔁 Several a day Comfort ★★★★★★★★★★
      Book: Garuda / Citilink / Lion / Wings
    🧭 Banda Aceh → Pulau Weh (Iboih): your options
    • Fast ferry Ulee Lheue → Balohan + taxi to Iboih Recommended
      ⏱ 45 min + 40 min CHF 15–25 🔁 2–3 a day Comfort ★★★★★★★★★★
      Book: At the port (buy early; weekends sell out)
    • Slow car ferry + taxi
      ⏱ 2 h + 40 min CHF 8–15 Comfort ★★★★★★★★★★
      Book: At the port
    • Tsunami museum & PLTD Apung ship

      A moving memorial: a 2,600-tonne ship carried 5 km inland in 2004.

      ⏱ 2 h
    🛏️ Night: Pulau Weh (Iboih)
  10. Day 10

    Snorkelling at Rubiah island

    A boat to Rubiah island, right opposite Iboih: coral gardens, turtles and reef sharks.

    • Rubiah sea garden

      Some of the best snorkelling in Indonesia straight off the beach.

      ⏱ Half day CHF 5–15
    • Kilometre Zero monument

      The northernmost point of Indonesia, at sunset.

      ⏱ 1 h
    🛏️ Night: Pulau Weh (Iboih)
  11. Day 11

    Diving day

    Two dives at Batee Tokong or the Canyon: big schools of fish, eagle rays and, with luck, mantas.

    • Two-dive trip

      Dive shops in Gapang and Iboih; try-dives for beginners.

      ⏱ Half day CHF 70–110
    • Sumur Tiga beach

      White sand on the east coast.

    🛏️ Night: Pulau Weh (Iboih)
  12. Day 12

    Ferry and fly home via Kuala Lumpur

    The morning fast ferry back to Banda Aceh and a flight to Kuala Lumpur for your connection home.

    🧭 Pulau Weh (Iboih) → Banda Aceh: your options
    • Taxi + fast ferry Balohan → Ulee Lheue + taxi to the airport Recommended
      ⏱ 2h30 CHF 20–35 Comfort ★★★★★★★★★★
      Book: At the port
    • Acehnese coffee

      Kopi Aceh, strained through a cloth, at a coffee house near the port.

    • 💡 AirAsia flies Banda Aceh → Kuala Lumpur daily; or fly back to Medan and connect there.
    🛏️ Night: Flight home
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Getting around

Transport without a car

Drivers and shared tourist cars between the stops, ferries to Samosir and Pulau Weh, and a domestic flight from Medan to Banda Aceh. Book everything through your guesthouse the day before.

🚘 Private driver ★★★★★★★★★★

The best way to travel: cheap, flexible and safe.

🚐 Shared minivan ★★★★★★★★★★

Shared tourist cars are cheap and convenient, but can be cramped.

🚌 Bus ★★★★★★★★★★

Public buses are slow, crowded and hard to find.

⛴️ Ferry ★★★★★★★★★★

Frequent ferries to Samosir; fast ferries to Pulau Weh.

✈️ Flight ★★★★★★★★★★

Cheap domestic flights; Lion and Wings are often late.

Where to stay & budget

Three budget levels

Per person per day, excluding international flights, sharing a room and splitting a private driver between two. With four people, drivers cost even less per person.

Budget CHF 30–50 per person / day
Comfort CHF 120–200 per person / day

Medan & Kualanamu airport

North Sumatra's chaotic capital and the international gateway. Not a sight in itself, but a great place to eat: Indian, Chinese, Malay and Batak food.

Where: Near Merdeka Walk, or an airport hotel for early flights.

Budget
CHF 20–35 / room / night
Budget hotel
Mid-range
CHF 40–80 / room / night
Business hotel (e.g. JW Marriott, Aryaduta)
Comfort
CHF 80–140 / room / night
Best hotel in town

Bukit Lawang

A riverside village on the edge of Gunung Leuser National Park, one of the last places on Earth to see wild and semi-wild Sumatran orangutans.

Where: Along the river, a short walk from the park entrance.

Budget
CHF 12–25 / room / night
Riverside guesthouse
Mid-range
CHF 30–60 / room / night
Eco-lodge with river view
Comfort
CHF 70–120 / room / night
Best jungle lodge

Berastagi

A cool highland market town at 1,300 m between two active volcanoes, Sibayak and Sinabung, surrounded by fruit and vegetable farms.

Where: In town, or near the hot springs at the foot of Sibayak.

Budget
CHF 15–25 / room / night
Guesthouse
Mid-range
CHF 30–60 / room / night
Hotel with volcano view
Comfort
CHF 60–100 / room / night
Resort

Lake Toba (Tuk Tuk, Samosir)

The largest volcanic lake in the world, with an island the size of Singapore in the middle. Batak villages with boat-shaped roofs, swimming, and total calm.

Where: Tuk Tuk peninsula on Samosir, on the lakeshore.

Budget
CHF 12–25 / room / night
Lakeside guesthouse
Mid-range
CHF 30–60 / room / night
Batak-style bungalow hotel
Comfort
CHF 60–110 / room / night
Best lake resort

Pulau Weh (Iboih)

A small green island at the northern tip of Sumatra, with some of the best diving and snorkelling in Indonesia right off the shore.

Where: Iboih (snorkelling) or Gapang (diving, quieter).

Budget
CHF 15–30 / room / night
Wooden bungalow over the rocks
Mid-range
CHF 35–70 / room / night
Dive resort bungalow
Comfort
CHF 70–120 / room / night
Best resort on the island

Practical

Good to know

🛂 Visa (Swiss passport)
Swiss passport: e-Visa on Arrival (e-VOA), IDR 500,000 (≈ CHF 27) for 30 days, extendable once by 30 days. Apply online at evisa.imigrasi.go.id before you fly, and fill in the All Indonesia arrival card (customs and health) within 3 days of arrival.
💉 Health
Recommended: hepatitis A, typhoid; consider rabies (monkeys and dogs). Dengue is common: use repellent. Malaria risk is low in these areas; ask a travel clinic. Leeches on the trek: long socks help.
🛡️ Safety
Safe and friendly. Aceh (Pulau Weh, Banda Aceh) applies Islamic law: dress modestly away from the beach, no alcohol, and swim in shorts and a T-shirt or rash guard outside the dive resorts. Check volcano alerts for Sinabung and never approach it.
💱 Money
Indonesian rupiah (IDR), about 19,000 IDR per CHF. Cash is king outside Medan and Banda Aceh; ATMs in Bukit Lawang and Tuk Tuk sometimes run dry, so bring enough.
🗣️ Language
Bahasa Indonesia and local languages (Batak, Acehnese). Guides and guesthouses speak English.
🕒 Time zone
UTC+7: 6 h ahead of Geneva in winter, 5 h in summer.
🔌 Plugs
230 V, type C/F: European plugs work.
📶 Phone & apps
Telkomsel SIM or eSIM (≈ CHF 10); good coverage in towns, none in the jungle.

Information last checked: September 2026. Visa rules, prices and timetables change, so always check before booking.