|The cave (Tham) is located in amphoe Ao Luk on Phi Hua To Mountains, which are surrounded by mangrove swamps. The cave is accessible by the same route as Tham Lot Tai with its entrance not far beyond the canal to Tham Lot Tai. The mouth of the cave is some 6-7 meters above ground level. From the entrance, the cave divides into 2 routes, the left one leading to a vast chamber pierced by a shaft of light, while the right route leads to a hall believed by archaeologists to have been once a shelter for prehistoric people. Rock paintings can be seen within the cave. The paintings, 70 of them, are painted in red and black and portray people as well as animals. The cave was named Phi Hua To or Big-headed Ghost owing to the unusually large skulls discovered there. All have since disappeared. A large pile of shells were also found in the cave.