Time stands still at this serene burial ground in the center of Budapest.

A collection of intricate sculptures so small they have to be seen through a microscope.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

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

A museum in the childhood house of a medical pioneer.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

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

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

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

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

The only gulag ever to exist in socialist Yugoslavia.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

Where the lovelorn find a home for their sentimental keepsakes.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.