Thailand is a great destination for adventure. Jungle trekking in Thailand is at its best in the north of Thailand in the Golden Triangle and around Chiang Mai.
Khao Sok National Park in the south of Thailand also offers great trekking, kayaking and other activities. Chiang Mai is a great base from which to enjoy elephant treks or some gentle river journeys.
Cycling in the north of Thailand and even around quieter areas of Bangkok is increasingly popular. Thailand is of course has superb diving and snorkelling in areas such as Phi Phi Island, Koh Surin and the Similan Islands.