Inside Niggly Cave: Australia’s Deepest Hidden Cave System

Beneath the forests of Tasmania lies Australia’s deepest known cave system. Descending more than 400 metres underground, Niggly Cave preserves ancient rivers, hidden chambers, and geological history stretching back hundreds of thousands of years. This documentary explores the formation of the Junee–Florentine karst, the extreme vertical shafts hidden beneath Mount Field, and the forgotten underground world that almost nobody knows exists.