(Photo: Maria Ly)
Guangxi Province, on China’s border with Vietnam, contains this natural wonder known as Moon Hill. The mountain is called that because the hole that goes straight through it is shaped like the moon.
(Photo: James Heilman)
Moon Hill is about 1,200 feet high. It's a popular tourist destination that offers a unique and fantastic view of the mountains on either side.
It's also popular with climbers who are looking for a vertical challenge.