Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

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

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

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

This is the oldest Roman-made bridge in the city still existing in its original state.

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

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.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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 crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Model trains whizz around an extensive room-sized diorama of Kyoto City.

A serene mountaintop temple complex featuring one big, bronze Buddha.

This small Japanese street is lined with figures, sculptures and a shrine dedicated to frogs.

An LED art installation composed of 600 poles wrapped in kimono fabric.

Surreal giant face-pillars welcome visitors from across the globe to this hotel.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

An eerie reminder to the horrors of World War II.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.