Tianmen Mountain is famous for the the world's longest cable car ride. But the mountain, which is almost 5,000 feet high, is also a popular location for BASE jumping. The most well-known case is Jeb Corliss’ daredevil flight through a tiny crack in Tianmen Mountain, as seen in this video. He jumped off a helicopter which may not be considered by some as a “BASE jump." You can see a daring wingsuit BASE jump here.