The natural cave through which Tunnel Creek flows is a major attraction of the park.

Many Aboriginal rock paintings and speleothems are present in the cave decorating the walls.

The park is located in the Napier Range and covers an area of 91 hectares (220 acres).

The range is composed of limestone and is the remains of a Devonian reef system formed around 350 million years ago.

There are large pools of water on the floor of the cave in which freshwater crocodiles have been found.