First stop was Trowutta arch. The arch is between two sink holes. Water moving through the limestone dissolves it and carries it away forming an underground cavern. When the cavern collapses it forms a sink hole. In this case there are two sink holes close together.

A light patch in the temperate rain forest.

The Sinkhole.

The Tarkine rain forest is characterised by large well spaced trees with these tree ferns growing on the ground floor.

Temperate rain forest.

Lake Chisholm a very large sink hole.

Inside the Tarkine rain forest.

Inside the Tarkine rain forest.