Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

The final resting place of the poets Shelley and Keats.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

Architectural monsters are devouring this palace's every door and window.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

An ode to the washerwomen who called Pavia home.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A historic landmark and museum filled with curious objects representing the history of Key West.

This network of roads is one of the most unique Etruscan creations ever discovered.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This artistic fountain display pays homage to this area's theatrical history.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

The world's first motel is now an administrative building for an apple farm.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

This monumental work of art symbolizes the coming together of a previously divided city.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

America's oldest Italian restaurant is a San Francisco institution.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

Does this strange mural depict witches battling beneath a penis tree?

Once home to one of the oldest banks in the world, this building is also where Marco Polo's famous travelogue was written.

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