Wannon Falls, Waterfall in Southern Grampians region, Victoria, Australia

Wannon Falls is a punchbowl waterfall in the Southern Grampians Shire, about 19 km west of Hamilton, Victoria. The Wannon River drops over a basalt lava cliff into a plunge pool 30 metres below. Downstream, a narrow steep-walled valley holds cascades around large fallen blocks.

The falls formed where the Wannon River crosses a basalt lava cliff, dropping 30 metres into a plunge pool. Downstream, a narrow valley was eroded as the falls retreated upstream, undermining a soft sediment bed beneath the hard basalt. The surrounding lava plains were built by volcanic activity.

The falls lie within a recreation reserve with picnic areas and interpretation signs, and a larger scenic reserve where native vegetation has been replanted in disturbed sections. The reserves are managed for visitors who come to watch the Wannon River drop over the basalt ledge.

The falls sit in a recreational reserve with picnic areas and interpretation signs, next to a larger scenic reserve of native vegetation and replanted disturbed ground. Access is via a road west of Hamilton, about 19 km away. Flow varies greatly between the wet winter and dry summer, so check conditions before visiting.

The narrow valley downstream of the falls was cut as the waterfall retreated upstream, undermining a soft sediment layer beneath the hard basalt. Large blocks that fell from the valley sides now sit in the channel, forming cascades around them.