The Best Things to Do in Thailand

Railay is a peninsula with no road in. You arrive by longtail boat from Ao Nang pier, a loud, salty 15-minute ride costing roughly 100-150 baht, and the cliffs that cut Railay off from the mainland are exactly what you came to climb. Shops like King Climbers and Hot Rock run half-day intro sessions for around 1,200-1,800 baht, gear included, on routes graded 5a to 5c that forgive wobbly footwork.

If you already climb, Railay turns serious fast. Tonsai Beach next door has multi-pitch lines up to 8a, with Thaiwand Wall and the Diamond Cave sector drawing climbers back year after year. Spring mornings are the move: by early afternoon the limestone bakes and your hands sweat through chalk faster than you can reapply it. Bring your own harness and shoes if you have them; rental gear here has seen a lot of hands.

The Similans are a national marine park, and the park closes to protect the reef every year from roughly mid-May through October. That means a spring trip is your last clean window before the monsoon swell rolls in and visibility drops. Liveaboard trips run three to four days out of Khao Lak, typically 15,000-25,000 baht depending on the operator and season, and put you at dive sites like Elephant Head Rock and Richelieu Rock where you'll see leopard sharks resting on sandy bottoms and, if you're lucky, a passing whale shark.

Don't dive? Koh Tao, over on the Gulf side, is the cheapest place on earth to learn. A PADI Open Water certification runs about 9,000-11,000 baht over three to four days, and the island's sheltered bays mean even nervous first-timers get calm water for their first open-water dives. Bring reef-safe sunscreen — Thailand's marine parks have started enforcing bans on the oxybenzone kind.

Doi Inthanon tops out at 2,565 meters, making it the highest ground in the country, and it sits about 90 kilometers — roughly a 1.5 to 2-hour drive — southwest of Chiang Mai city. The summit boardwalk, the Ang Ka Nature Trail, is flat and easy, good for anyone. The Pha Dok Siew trail is the better test: about 3 kilometers one-way through forest and past two waterfalls, moderate grade, doable in two to three hours round trip.

Here's the honest spring caveat: Chiang Mai's agricultural burning season runs roughly February through April, and it hazes up the valley views you'd otherwise get from the ridgelines. Go early, before 9am if you can, when the air is clearer and the heat hasn't built. Pack a light fleece regardless of the heat down in the city — the summit sits 10-15°C cooler and gets genuinely chilly in cloud cover.

Phang Nga Bay is where limestone islands rise straight out of flat, jade-green water, and the only way into its best features — the hongs, or hidden internal lagoons — is by kayak at low tide, ducking under rock overhangs with your head nearly in the water. Day trips from Krabi or Phuket run about 1,500-2,500 baht, usually including a stop at Khao Phing Kan, the islet better known as James Bond Island.

This one's low-difficulty but not zero-effort: expect two to three hours of actual paddling broken into shorter stretches. Go with a smaller operator if you can — the big tour-bus crowds hit the famous hongs around midday, and a guide who times the tide right will get you into the quiet lagoons before the fleet arrives.

Erawan National Park sits about 65 kilometers from Kanchanaburi town, and its namesake waterfall climbs through seven distinct tiers, each one pooling into a swimmable emerald basin before spilling to the next. Park entry runs roughly 300 baht for foreign visitors, and the hike to the top tier is about 2 kilometers one-way over rock and root, steeper and more slippery than it photographs.

This is not a flip-flop hike. The rock near the pools gets a limestone coating that turns slick with spray, and every spring a handful of visitors end up with a scraped shin learning that the hard way. Trail shoes with real grip, or at minimum sturdy sandals with ankle straps, make the difference between enjoying tier five and turning back at tier three.

The Mae Hong Son Loop runs roughly 600 kilometers from Chiang Mai through Pai, down to Mae Hong Son town, and back through Khun Yuam, climbing and dropping through mountain switchbacks the entire way. Riders quote the curve count in the thousands, and whether or not you count them, your forearms will know it's not an exaggeration by day two.

Give yourself a minimum of four to five days to do it without rushing blind corners in the dark. Rent in Chiang Mai: a basic automatic scooter runs about 200-300 baht a day, but the steep, poorly-cambered sections near Pai and Mae Hong Son really call for a semi-automatic or small trail bike, closer to 800-1,200 baht a day. You'll need an international driving permit — Thai police checkpoints on this route do check, and insurance claims get complicated fast without one.

Khao Sok's rainforest is reckoned to be one of the oldest in the world, and the limestone towers rising out of Cheow Lan Lake make it look like nowhere else in Thailand. Floating raft-house bungalows dot the lake's edges, reached by a boat crossing of about 1.5-2 hours from the dam pier, and most stays combine a lake day with a forest trek the next morning.

The trek to Tan Sawan waterfall is a solid moderate outing — humid, buggy, occasionally muddy underfoot — and you're genuinely more likely to hear a gibbon call than see one. Pack leech socks if you're trekking in the wetter spring weeks; locals wear them without embarrassment for good reason.

Thailand's gyms range from tourist-friendly drop-in sessions to camps that still train active fighters, and the difference shows up fast in a single class. A drop-in pad session at a serious camp costs around 400-600 baht, and a full week with accommodation runs roughly 4,000-6,000 baht at mid-tier camps in Chiang Mai, more at Phuket's bigger operations geared toward fighters prepping for actual bouts.

Go in expecting to be sore in muscles you didn't know you had. Sessions typically run 90 minutes to two hours, splitting time between pad work, bag rounds, and clinching, and the Thai trainers holding pads for you will push the pace well past what a Western gym class considers normal. Wrap your own hands if you can — rental wraps get a lot of mileage.