Tham Lot (Thai: ถ้ำลอด) is a cave system with a length of 1,666 meters near Soppong in Pang Mapha district, Mae Hong Son Province, northern Thailand. The Nam Lang River flows through the cave which is filled with stalactitesand stalagmites. The cave is also home to large numbers of bats and swifts. In Tham Lot and other caves nearby teakwoodcoffins have been discovered which are thought to have been carved by the Lawa tribespeople thousands of years ago.