This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A self-built castle made by a mysterious man.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Most-visited and most-photographed slot canyon in the American Southwest.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

Nelson Mandela lived here with his family from 1946 until his arrest in 1962.