What is the fine-grained topic of the following text: This volume has over 1,150 caves, rock shelters, stream sinks, resurgences and other sites which may be of speleological interest from the provinces of Chiang Mai, Chiang Rai, Lampang, Lamphun, Mae Hong Son, Nan, Phayao, Phrae, Sukhothai and Uttaradit. Only return the topic.
Speleological sites in specific provinces of Thailand