Statue of death tucked in the University of Medicine courtyard.

A surrealist timepiece by the artist of melting clocks.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

This demon atop the Notre-Dame de Paris looks utterly bored.

The narrowest street in Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

Notorious artist squat renovated into legal studios.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

A fake Transylvanian castle houses a cathedral of antlers.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Museum dedicated to the terror regimes of Hungary.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

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

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Once the home of a hermetic monk, this cave now houses a small church.

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

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.