Fiery-hot river rocks make soup sizzle at this restaurant showcasing indigenous Chinantec cuisine.

Ever hear of the Milazzo Cage?

An abused and forgotten metropolis, abandoned for centuries.

A museum glorifying the life of Stalin, located in the city of his birth.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

The decaying remains of a once-luxurious Soviet spa town.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Foreign invaders almost left this lovely Caucasus palace alone—almost.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

What might be the largest completely Jewish town in the world outside of Israel now faces dwindling numbers and empty streets.

Home to nearly a third of the world's mud volcanoes, Azerbaijan is home to a messy, bubbling, and sometimes explosive landscape.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

The former home of an Italian artist is now a shrine to his ambitious works.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

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

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

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

A sculpture serving as an homage to Pope John Paul II.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.