Thailand's limestone coast, rainforest parks, mountains and islands offer climbing, diving, jungle hikes and waterfall swims. Here is what each spot involves, when it is open, and how to get there.
Park fees and opening times were checked in September 2026; confirm them with the park before you go. Operator prices change often, so compare two or three operators.
Thailand's Main Adventure Destinations
| Activity | Where | Season or opening | Good for |
|---|---|---|---|
| Diving and snorkelling | Similan Islands | 15 October to 15 May | Divers and strong swimmers |
| Diving | Koh Tao | Check with dive schools | Beginner and certified divers |
| Rock climbing | Krabi coast (Railay, Ao Nang) | Ask local climbing schools | Beginners with a guide, experienced climbers |
| Jungle trekking and caves | Khao Sok National Park | Visitor centre daily 08:00–16:30 | Hikers who want rainforest |
| Waterfall hike and swim | Erawan National Park | Daily 08:00 to about 16:30 | Families and casual hikers |
| Mountain hikes | Doi Inthanon, Phu Kradueng, Khao Yai | Some trails close between June and October | Walkers who want views and cool air |
| Zip-lining and rafting | Chiang Mai and Pai | Ask local operators | First-time thrill-seekers |
Diving in the Similan Islands
The Similan Islands National Park in the Andaman Sea is known for diving and has strict rules:
- Season: open from 15 October to 15 May; closed during the southwest monsoon.
- Park fee: 500 THB for foreign adults and 250 THB for children aged 3–14.
- Hours: visitors only 08:00–16:00.
- Daily limit: 3,325 visitors a day, so book your trip early.
- No overnight stays on the islands: there is no camping or park accommodation. Visit on a day trip or sleep on board a liveaboard boat.
- Koh Tachai: closed to the public since 2016.
Ask the operator where the boat leaves from, whether hotel pickup is included, and whether the park fee is in the price. Smile Taxi Service has no fixed fare to the Similan piers; ask for a quote on WhatsApp.
Diving on Koh Tao
Koh Tao, a small island in the Gulf of Thailand, has many dive schools for beginners. Lomprayah high-speed ferries run between Koh Samui, Koh Phangan and Koh Tao, and from the mainland at Chumphon and Surat Thani (Donsak). Each high-speed leg takes about 45 to 90 minutes. Before you pay for a course, check the group size and the equipment.
Rock Climbing on the Krabi Coast
The limestone cliffs around Railay and Ao Nang in Krabi province are popular with climbers. Local climbing schools teach beginners and guide experienced climbers. If you have never climbed outdoors, book a course with a certified instructor. Before you book, ask:
- How many climbers does each instructor look after?
- Is all the equipment included, and what condition is it in?
- What happens if it rains?
Getting there: a Smile Taxi Service transfer from Phuket Airport to Ao Nang Beach costs 2,200 THB by sedan, 2,400 THB by SUV and 3,000 THB by van. Book a sedan from Phuket Airport to Ao Nang Beach. For other routes, see how to get from Bangkok to Krabi and how to get from Phuket to Krabi.
Jungle Trekking and Caves in Khao Sok
Khao Sok National Park covers 739 km² of rainforest and includes Cheow Lan Lake, the 185 km² reservoir of the Ratchaprapha Dam. It is about 160 km from Phuket and about 150 km from Krabi.
Fees for foreigners are two separate tickets, paid in cash:
- Headquarters (jungle) area: 200 THB per adult, 100 THB per child aged 3–14.
- Cheow Lan Lake: 300 THB per adult, 150 THB per child.
A ticket covers more than one day only if you stay overnight in the park.
Trails:
- Wing Hin waterfall: 2.8 km from the visitor centre.
- Bang Hua Rat waterfall: 3 km.
- Sip Et Chan falls: about 4 km; you need a guide beyond the boardwalk.
- Ton Kloi waterfall: 7 km; the first 2.9 km can be walked without a guide, the rest needs one.
- Look Nam cave loop: 8.5 km with a guide. The cave is closed when rain is forecast, so keep a spare day in your plan.
Getting there: Smile Taxi Service has no fixed fare to Khao Sok. Send your pickup point and date on WhatsApp for a quote. See also how to get from Bangkok to Khao Sok.
Waterfall Hiking and Swimming at Erawan
Erawan National Park, about 200 km west of Bangkok in Kanchanaburi province, has a seven-tier waterfall with pools.
- Trail: about 1 km of flat path to the lower falls, then about 1.5 km more to the 7th tier.
- Swimming: allowed in the pools along the trail up to tier 6.
- Hours: 08:00 to about 16:30 every day. No entry after 15:30, and rangers start clearing the top tier around 15:00.
- Fees for foreigners: 300 THB per adult, 150 THB per child aged 3–14; car 30 THB.
- Food rules: no food above the second tier (bags are checked); drinks bottles need a 20 THB deposit, refunded when you bring the empty bottle back.
Arrive at 08:00 to leave time for the climb.
Getting there: local bus 8170 runs from Kanchanaburi bus terminal to Erawan in about 1.5 hours for 60 THB. The last bus back leaves Erawan at 16:30. A Smile Taxi Service transfer from Bangkok to Kanchanaburi city costs 2,000 THB by sedan, 2,300 THB by SUV and 2,800 THB by van: book a sedan from Bangkok to Kanchanaburi. For a car to Erawan itself, ask for a quote on WhatsApp. More options: how to get from Bangkok to Kanchanaburi.
Mountain Hikes: Doi Inthanon, Phu Kradueng and Khao Yai
- Doi Inthanon (Chiang Mai): Thailand's highest point at 2,565 m. The Kew Mae Pan loop is 2.5 km and must be walked with a local Hmong guide (guide fee 220 THB; park fee 300 THB per foreign adult). The trail is closed from June to October and reopens on 1 November.
- Phu Kradueng (Loei): a climb of 5.2 km from 285 m up to a plateau at 1,275 m. The park is closed from June to September. The trail up opens only until 13:00, so start in the morning. Porters carry bags for 30 THB per kg. The park fee is 200 THB per foreign adult.
- Khao Yai: 400 THB per foreign adult, gates open 06:00–18:00. Haew Narok waterfall is a 600 m walk from its car park; Haew Suwat waterfall is about 100 m from its car park.
Getting there: the Smile Taxi Service full-day private Chiang Mai + Doi Tour (up to 10 hours) costs 3,300 THB by sedan, 3,500 THB by SUV, 4,000 THB by van and 4,500 THB by VIP van. If you want to walk a trail at Doi Inthanon, send the team your plan before you book. A transfer from Suvarnabhumi Airport to Khao Yai costs 2,000 THB by sedan, 2,300 THB by SUV and 2,800 THB by van: book a sedan from Suvarnabhumi to Khao Yai. See also how to get from Bangkok to Khao Yai. For Phu Kradueng, ask for a quote on WhatsApp. All tours are listed on the tours and day trips page.
Zip-Lining and Rafting in the North
The hills around Chiang Mai have several zip-line parks, and rafting is offered around Pai. River levels change with the seasons, so ask the operator which months it runs trips.
A Smile Taxi Service transfer from Chiang Mai to Pai costs 2,200 THB by sedan, 2,700 THB by SUV and 3,500 THB by van: book a sedan from Chiang Mai to Pai.
Staying Safe
- Check your insurance. Make sure your travel insurance covers the activity, especially diving, climbing and rafting.
- Choose operators who show their safety equipment and their instructors' certifications.
- Carry cash for national park fees, which are paid at the gate.
- Protect yourself from the heat. Carry water, a hat and sunscreen, and go out early or late in the day.
- Ask about age and weight limits before you book.
- Tell someone your plan and the time you expect to return.
Emergency numbers in Thailand: Tourist Police 1155, police 191, ambulance 1669, fire 199.
Travelling with Smile Taxi Service
Smile fares are fixed, per vehicle (not per person) and one way, with expressway tolls included. A sedan takes up to 3 passengers and 2 bags, an SUV 5 and 4, and a van 7 and 5, useful for dive bags and climbing gear. Pay the driver in cash (THB) at the end of the trip; if you can only pay by card, ask for a PayPal payment link (a 5% fee is added). Cancellation is free up to 24 hours before pickup. After that, a cancellation or change costs 25% (less than 24 h), 35% (less than 12 h) or 50% (less than 2 h) of the price, and a no-show 100%, also when you pay the driver in cash (details). All routes are on the fare list.
FAQ
When can I dive the Similan Islands? From 15 October to 15 May. The park fee is 500 THB for foreign adults, and you cannot stay overnight on the islands.
Do I need a guide in Khao Sok? Yes for Ton Kloi beyond 2.9 km, Sip Et Chan beyond the boardwalk, the Look Nam cave loop and other longer trails.
Can I swim at Erawan? Yes, in the pools along the trail up to tier 6. Arrive early, because no one may enter after 15:30.
Can I hike Kew Mae Pan in October? No. The trail is closed from June to October and reopens on 1 November.
Who do I call in an emergency? Tourist Police 1155, police 191, ambulance 1669.
To plan your adventure trip, message us on WhatsApp, or book a transfer on the Smile Taxi Service booking page.