Rock climbing in Thailand is practiced wherever there are rocks, and even where there are not. Some of the best places for rock climbing are in the central regions near Huay Kha Khaneng Wildlife Sancturary in Uthai Thani Province, or in the spectacular limestone mountains that run through Kanchanaburi, Phetchaburi, and Prachuap Khuri Khan.
On the East Coast and easily accessible from Bangkok are sites in Chon Buri. The spectacular coastal cliffs of Railay Beach in Krabi are the climbing focus of the South.
For abseiling, the popular place is in Ban Pha Ngam, Prachinburi Province. Climbing and abseiling is a technical sport. You should not go alone, especially if you are a beginner. The discipline is safe if you use first class equipment, go with an experienced guide and instructor, who show you how to practice safe climbing, and if you follow safety procedures.