Mummy Cave

Mummy Cave is a rock shelter and archeological site in Park County, Wyoming, United States, near the eastern entrance to Yellowstone National Park.
Although it is referred to as a "cave", Mummy Cave is actually a broad, shallow alcove in a vertical cliff. It owes its depth to its overall size and the stability of the parent rock. The alcove's roof is about 50 feet (15 m) above the river, with the rock floor of the alcove at about 4 feet (1.2 m) above the river.