Powerscourt Waterfall - Wikipedia, the free encyclopedia

Powerscourt Waterfall - Wikipedia, the free encyclopedia: "In August 1821, during the visit of King George IV to Ireland, Richard Wingfield, 5th Viscount Powerscourt decided to dam the waterfall, so that he could release a torrent while the two stood on the bridge below the falls. The king was unable to leave a banquet at Powerscourt House; however when the water was finally released, the bridge was washed away"