Others advised using the restroom beforehand, as the tour can last more than an hour and there are no facilities within the cave. Ruby Falls is open from 8 a.m. to 8 p.m. daily, year-round.

At 145 feet tall, Ruby Falls is an amazing example of a subterranean waterfall. Amazingly, this waterfall is hidden within another well-known attraction. Can you guess where in the world it’s ...