1 Khao Yai National Park
Easy and tough trails, lots of birds, gibbons and elephants, several waterfalls and night safaris.
2 Khmer ruins
Exquisite Angkor Wat-style temples at Phimai, Phanom Rung and Khao Phra Viharn.
A northeastern speciality, available all over the region but particularly in Khon Kaen.
4 Yasothon rocket festival
Bawdy rainmaking ritual involving ornate home-made rockets.
5 Phu Kradung
Teeming table mountain, the most dramatic of the region’s national parks.
6 The Mekong
The best stretch in Thailand for gentle exploration of the mighty riverscape is between Chiang Khan and Nong Khai.
7 Wat Phu Tok
Extraordinary meditation temple on a steep sandstone outcrop.
8 Wat Phra That Phanom
Isaan’s most fascinating holy site, especially during the February pilgrimage.