Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

Even Henry David Thoreau found this glacial pothole irresistible.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

The only diamond mine in the world where you can keep what you find.

One of the oldest living oak trees in the Southeast.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

See massive fossils that are over 200 million years old in northeastern Arizona.

European castle ruins in an American state park are actually the product of death and grief.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The first declared National Monument in the United States.

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