Located on a tall cliff, Tham Pha Kradan Lek is a small cave that houses a slap of sandstone with an old inscription that noone could decipher. Some say it could be a record of an event, others think it looks more like a map. Or maybe, it’s just a graffiti by a stone-age artist. Come and see it for yourself. Who knows, you might be the first person to solve the mystery.