Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Five candy-colored villages on the Italian Riviera.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

An extravagant western hotel where every floor is the "ground floor."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A stone face watches over the river.

Perhaps the most scandalous statue of America's first president.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

An adorably sweet display of sculpted Precious Moments figurines.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

Ever wanted to can Spam?

A 1,100-ton train fell through the floor in 1953. Workers got it patched up in just 72 hours.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.