This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Like something out of a bad acid trip, this Ukraine hallway has been covered in hallucinatory phantasmagoria.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

This hidden fortress has been coined the "City of Ghosts."

One of the largest remaining ancient burial mounds of the 10th century.

This underground transport hub doubles as an art gallery.

This exquisite, alienesque piece of Soviet architecture is being threatened by modern shopping malls.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

The last planned Soviet city was built for the former residents of Pripyat after the Chernobyl disaster.

This oddly shaped building is a surprising Soviet-era crematorium.

The ruins of an abandoned church loom within a picturesque Ukranian village.

The deepest metro station in the world.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

A subterranean Holocaust refuge within one of the world's longest cave systems.

Inside the corridors of this flea market, visitors are sure to find some obscure and odd treasures.

Bizarrely-painted church designed by a controversial artist.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

A three-shelf library serves as a memorial in the Jewish cemetery of Krems.

"World machine" built by an untrained Austrian farmer.

American soldiers discovered Europe's best one-liner at the end of World War II.