This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Secret refuge and museum of the Duke of Florence.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This curious, round temple is the oldest still-standing marble building in Rome.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ancient market is often referred to as the oldest shopping mall in the world.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This large, circular tomb is the final resting place of the first emperor of Rome.

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

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The mummified relic of St. Antoninus.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

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

Multiple waterfalls and several historic CCC buildings anchor this state park in Oregon's Willamette Valley.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

A sculpture of a salmon swimming through a brick building.