Sam Phan Bok (Three Thousand Holes)

About this Place

Sam Phan Bok (Three Thousand Holes) is one of Southeast Asia's most dramatic geological phenomena — a 3km stretch of the Mekong riverbed that is exposed during the dry season (December–May), revealing thousands of naturally carved rock pools, channels, and formations etched over millennia by the river's force. Known as the "Grand Canyon of Thailand," the exposed sandstone landscape is otherworldly: pools of trapped water reflect the sky, channels run between formations, and the sheer scale of the erosion patterns is humbling. Local boats take visitors onto the exposed rock field during low water. The Mekong itself flows in a narrowed channel beside the rock field. Best visited January–March when water levels are lowest. Located near Pha Taem National Park — combine both in a single day from Khong Chiam town (10km). A geological spectacle unique to the Mekong basin.