The best one day walk in the blue mountains. steep in parts.
Canyoning and abseiling are also popular activities.
Walking trails, including:
Darwin's Walk
Named after charles darwin who visited the area, and did the walk. about 2 hours long, staring from the station and ending at the falls, so great for those visiting by train. gentle grade.
the Wentworth Pass track
Which allows you to swim at the bottom of the falls.