Powerscourt Waterfall, Natural cascade in County Wicklow, Ireland.

Powerscourt Waterfall is a cascade in County Wicklow that drops 121 meters into the Glensoulan valley. The water flows through the River Dargle, beginning its journey from springs on Tonduff mountain's slopes.

In August 1821 Richard Wingfield, 5th Viscount Powerscourt, dammed the waterfall to release a torrent for King George IV, who was staying at Powerscourt House during his Irish visit. The king never left the banquet to watch, and when the water was finally released the bridge below the falls was washed away.

The location has served as a filming site for several productions, including the medieval fantasy film Excalibur and the television series Vikings. Visitors walk through the same landscapes that appeared in these well-known works.

The waterfall has its own visitor entrance about 6 miles from the main Powerscourt Estate entrance, with car parking, picnic and barbecue areas at the base. It can also be seen from Ride Rock in Crone Woods, reached on the 7 km, 3-hour Maulin Circuit. Access is paid and limited to set times.

The waterfall drops over Irish Ribband Group schists set in a metamorphic aureole of Leinster granite. In the pools at its base, visitors can pick out boulders of both rocks: schist with a silvery sheen and speckled crystalline granite. The Geological Survey of Ireland cites the corrie as a fine example of glacial erosion.