Devil's Bridge Falls.

Devils Bridge Falls is a world famous tourist attraction 12 miles from Aberystwyth. These unique waterfalls have attracted many thousands of visitors since the 18th century, including William Wordsworth who wrote about the "Torrent at the Devil's Bridge". Today, the Falls Nature Trail provides a unique opportunity to see this great natural feature in the Rheidol Gorge.
http://www.devilsbridgefalls.co.uk/