Art Nouveau painter Alphonse Mucha spent 18 years creating these monumental paintings of Slavic history and mythology.

Out of a labyrinth of abandoned tunnels and stops, this Queens subway station is arguably the most mysterious—if it exists at all.

A field filled with carved medieval tombstones called stećak.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

An apparition of Virgin Mary in Herzegovina.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

This abandoned airplane hanger is said to have once been a top secret launch facility.

In this town's main square resides a statue of none other than the 43rd President of the United States.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

Gigantic water vessel, permanently grounded in Southern Albania.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

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

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This elevator was built in 1907 to connect two neighborhoods separated by a steep, rocky cliff.

A Cold War secret surveillance tower used to spy on radio communications.

This tower once served as a radar station during the Cold War.

Lions carved into the rockface adorn these two tombs built into the mountains of Dadan.

The unique building practices of the Batammariba reflect the community's deep reverence for and connection to the earth.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

The location where the iconic movie character declared it was time to go home.