What was once the largest NFL stadium.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

The only surviving prototype for Buckminster Fuller's house of the future.

Astounding collection of coin-operated games and automata.

A giant Troll lurks under one of Seattle's oldest bridges.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Northern Ireland's Brobdingnagian stepping stones.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Famously misunderstood wonder of the ancient world

Macabre astrological automaton clock dating to the late 1400s.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”