🔄 Updated 21 Jun 2026
Short answer: For lovely, easy-access falls choose Kanchanaburi (Erawan) or Khao Yai (Haew Suwat); for the biggest waterfall, Tak (Thi Lo Su/Umphang); for Isan mountains and falls, Loei (Phu Kradueng) or Phetchabun (Khao Kho); and for the east, Chanthaburi (Phlio waterfall).
The picks, ranked
Kanchanaburi (Erawan)
The seven-tier Erawan waterfall with its famous emerald pools is one of Thailand’s best — hike to the upper tiers, with the river, raft stays and green forest, all near Bangkok.
Khao Yai
Thailand’s first national park, with the Haew Suwat and Haew Narok waterfalls, big forest, wildlife and trails — falls are full and the green is best in the rains.
Tak (Thi Lo Su/Umphang)
Thi Lo Su, Thailand’s largest waterfall — wide and tall — sits in Umphang and is reached by road and rafting, ideal for adventurers who want a top-tier falls.
Loei
The upper-Isan mountains — Phu Kradueng and Phu Ruea, with waterfalls, pine forest and cool air, great for hiking and camping; lush and full in the rains, quieter than in winter.
Phetchabun (Khao Kho)
Khao Kho and Phu Thap Boek, with the sea of mist, waterfalls and layered mountain views — the closest misty mountains to Bangkok, great for a weekend nature drive.
Chanthaburi (Phlio Falls)
Phlio waterfall with its fish-filled clear stream and Khao Khitchakut (a hilltop Buddha footprint open in pilgrimage season), in a quiet riverside province — great east-coast nature.
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