Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

This super steep hike ascends 2,000 feet in less than a mile.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A layered tribute to the work of mosaicist Isaiah Zagar.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Commemorating the spot where the famous scientist fed his pigeons.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Step inside Lucy, the world's largest "elephant."

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

In which a local geological marvel becomes a quaint roadside attraction.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

One of the world's largest model railroads is a mind-boggling achievement.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

A farm in New Jersey grew a most unusual crop for AT&T's testing purposes.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.