Before revision: A renowned example in the United States is Ruby Falls, high, in Lookout Mountain Caverns, a show cave in Tennessee .
After revision: Renowned examples includeand Gaping Gill in the Yorkshire Dales, UK with a fall of 98 metres (322 ft).Gaping Gill chamber with the waterfall in the background Ruby Falls, high, in Lookout Mountain Caverns, a show cave in Tennessee .