Buried in the Laos jungle is a sanctuary for bears that would have otherwise been milked to death by poachers.

More than 200 statues filled with cryptic symbols give this park spot an aura of horror vacui fantasy.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

A marvel of Byzantine engineering under the streets of Istanbul.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

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

The first museum in the world devoted to sexual gadgetry.

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.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A small museum in the Golden Triangle tells the story of the opium drug trade that gripped Northern Thailand.

This extensive collection of dead bugs may be the world's most idiosyncratic and personal insect museum.

Where an entire elephant skeleton, a snakeskin table runner, and thousands of animal remains become art.

A white Buddhist temple with a golden restroom.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

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.

A museum in the childhood house of a medical pioneer.

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

Museum dedicated to the terror regimes of Hungary.

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

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.