Two stunning 17th-century libraries and a cabinet of curiosities.

Microscopic scenes; some call it novelty, some call it art.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Steadily reminding Czechia of its past.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Where the lovelorn find a home for their sentimental keepsakes.

The resting place for anonymous victims of the Danube's dark waters.

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.

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

Museum dedicated to the terror regimes of Hungary.

Electrical curiosity museum housed in an old transformer station.

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

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

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

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

A Hungarian pharmacy museum with a box full of mummy powder.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A spherical "micro-nation" in the heart of Vienna.

Macabre museum devoted to historical Viennese murders.