Nigretta Falls, Punchbowl waterfall in Southern Grampians Shire, Australia.

Nigretta Falls, formerly Upper Wannon Falls, lies on the Wannon River about 16 km west of Hamilton in Victoria's Southern Grampians Shire. The river breaks over jointed Devonian rhyolitic rock, dividing into several smaller drops and bounces rather than one plunge, then falls into a large pool before flowing on toward Wannon Falls, 10 km downstream.

The site was once called Upper Wannon Falls and marks a key section of the Wannon River. This river originates in the Grampians mountains and has carved through the red volcanic landscape over millennia.

The reserve shelters native plants and wildlife that thrive in this natural habitat. Walking through the area, you notice how local species depend on the flowing water and surrounding vegetation for survival.

You can reach the falls from the town of Hamilton via a sealed road that leads directly to the reserve. Parking areas, picnic facilities, and viewing platforms are set up for comfortable access to the waterfall.

The falls drop about 9 metres over jointed Devonian rhyolite, splitting into several channels rather than one plunge. Flow changes with the season; the reserve also protects native plants of the Dundas Tablelands in the Wannon River Valley.