A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Faceless white figures loom over the city from the rooftop.

A huge musical instrument played by the ocean.

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A naturally beautiful, seemingly bottomless deep blue spring.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Erotic art covers the walls of the largest ancient pleasure palace.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This tomb's name derives from a famous painting of a white horse found inside.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

Numerical symbolism abound at East Asia's oldest observatory.

The best place for scenic views of the DMZ and North Korea.

Tracking the 1,500-year history of Korea's star cabbage.

Secret North Korean passage discovered below the world's most dangerous border.

Across this single-file rope bridge is what has been claimed to be the edge of continental Asia.

This statue of an eagle taking flight welcomes visitors to Langkawi.

This dangerous-looking suspension bridge may have been too unstable to remain open.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.