Go inside to really appreciate this 500-year-old technological masterpiece.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The best place to send your postcards home from Antarctica.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

"Only the devil could play golf here."

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

Kentucky's longest operating jail is now a spooky spot to spend the night.

A gas station has taken the place of the home of the 19th American President.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

One of the best places to see wild Colonial Spanish Mustangs in the United States.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

A tiny but mighty little pumper sits in the middle of the street, waiting for the next big oil strike.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

A local prank turned town icon.