This ambiguous pig shrine is actually a monument to a beloved queen.

Chronicling the history of Thailand’s unique currencies, from the silver “bullet money” to porcelain gambling tokens of various shapes.

Time-frozen department store of dangerous and dusty relics.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

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

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

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

This former insane asylum now holds a pathological anatomy museum.

This museum promotes informed contraception by documenting its often secret past.

Annual technopop celebration of peace and love.

The house that took a plunge into the facade of a museum.

"World machine" built by an untrained Austrian farmer.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Legends surround an ancient tree trunk riddled with nails for good luck.

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

A silly medieval mural preserved on the side of a Viennese house.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

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

Op-art architecture designed for happiness.

A unique hotel for the artistic soul.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

One of the largest barracks of the Austro-Hungarian monarchy's military is now an abandoned ruin.