The Spanish king's private bathroom embraced the idea of a porcelain throne.

A museum dedicated to the centuries-old cave dwellings that housed marginalized communities on the outskirts of the former capital of Muslim Spain.

Inside this building is another country within Rome, a sovereign entity without a physical territory.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

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

This building features dozens of faces along its facade, although one is a bit chilling.

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

Gargoyle head that brings good luck.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

One of the best-preserved medieval streets in Europe.

The rocky remains of an ancient Greek forest.

Legend says this sacred tree was a gift from goddess Athena.

An abandoned outdoor movie theater in the Sinai desert.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

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

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

This Costa Rican topiary park is a surreal garden of unearthly delights.