Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Colonial architecture meets urban art in this sprawling open-air gallery.

An artist's suburban abode looks like an architectural fever dream.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

The metal leaves on this tree are engraved with the names of Holocaust victims.

A Hungarian optometrist's charming collection of Asian art and curiosities.

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

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

A forgotten graveyard lost in the tangles of an overgrown garden.

Budapest's Communist-era statues, banished to the suburbs.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A magnificent collection of imperial armor and weaponry.

The beautiful baroque library of the Hapsburg empire.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Apartment complexes built into huge repurposed natural gas tanks.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

Handsomely crafted representations of our round planet.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

This former insane asylum now holds a pathological anatomy museum.

The final resting place for the remains of 143 Habsburg royalty.

A mocking tribute to the past and modern leadership of Prague.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.