Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An entire town preserved as a historic landmark.

New fungal and bacterial species call this deadly lake home.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

Could it have picked a better place to land?

An outlandish shoe shaped house built by an eccentric millionaire.

There aren't too many operational funiculars around, but Pittsburgh has two!

A local prank turned town icon.

A toxic ghost town sitting atop a massive coal fire.