[4] Powerscourt Waterfall, known in Irish as Eas Chonaill, lies at the base of the Glensoulan valley, a hanging valley, through which the River Dargle flows from its source on the southern slopes of Tonduff mountain, eventually falling into the steep corrie in which the waterfall lies.

[5] The Powerscourt waterfall flows over Irish Ribband Group schists, which sit in a metamorphic aureole of Leinster granite.

[4] In August 1821, during the visit of King George IV to Ireland, Richard Wingfield, 5th Viscount Powerscourt dammed the waterfall so he could release a torrent while the two stood on the bridge below the falls.

For reasons unknown, the king did not leave the banquet at Powerscourt House to view the waterfall, which was fortunate as, when the water was finally released, the bridge was washed away.

[10] A number of fatal accidents have taken place at Powerscourt Waterfal.l[11] [12][13] The waterfall appears in the medieval fantasy film Excalibur (1981)[14] and the television historical drama series Vikings (2013–2020).