360° panorama by Bill Landenberger.
Click the image to open the interactive version.

Gap Creek Falls are in Watagans National Park, west of Lake Macquarie.  The falls used to be known as Brownes Falls until about 20 Years ago - named after the family who owned a sawmill at Martinsville.  Geologically the falls occur on the lower section of the Narrabeen Subgroup, which comprises Triassic sandstones, siltstones and claystones.  This panorama was taken with a 21mm rectilinear lens to allow use of a circular polarising filter.  A counterpart taken with a fisheye (and consequently no polariser) can ve viewed here.

https://www.360cities.net/image/gap-creek-falls