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

A vast city of the dead, where the deceased outnumber the living by more than a million.

Oldest building in California still in use.

Possibly the world's only drive-in movie theater with an attached motel.

A multi-storied adobe complex has been inhabited for more than a thousand years.

This popular pilgrimage site offers a hole filled with holy healing dirt.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

The location of a citizen uprising that led to a gruesome act of mob justice.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A six-ton wedding present for the King of the Scots.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

The most northern place on the mainland of Great Britain.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

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

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

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

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