The ruins of an ancient stadium that hosted gripping chariot and horse races.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The earliest known map to show America, discovered by accident at a Paris bookshop.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Odd outsider art installations surround a Gold Rush-era ghost town.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A building so large that it has its own weather.

Once one of the largest producers of pig iron in the world.

This replica of the Greek structure is in the heart of Nashville.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A bit of retro transportation flair preserved in the world's largest department store.

The quiet canyon has a tumultuous history involving a doomsday cult.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.