Volume 2 of The Caves of Thailand covers the northern provinces of Chiang Mai, Chiang Rai, Lampang, Lamphun, Mae Hong Son, Nan, Phayao, Phrae, Sukhothai and Uttaradit. This region has Thailand's deepest caves and many of the longest caves.

Over 1,150 caves, rock shelters, stream sinks, resurgences and other
sites of speleological interest are fully detailed, supported by 233
surveys and a bibliography with over 500 references.