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

The triumvirate of postwar Korea—Kim Il-sung, Syngman Rhee, and Lee Ki-poong—once vacationed on this seaside peninsula.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The ruins of an ancient Zoroastrian Tower of Silence believed to be the earliest example of the traditional funerary practice.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

Home to what was once considered the largest gate in central Asia.

Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

Controversially restored in the 1970s, this giant 15th-century mosque is shrouded in legend.

More than 10,000 small mirrors cover the curved surface of the world's second-largest solar oven, located in a remote village in Uzbekistan.

Giant cauldrons overflow with Uzbekistan's favorite rice dish at this cavernous dining hall.

Prowl through this sprawling bazaar under a massive Soviet-era dome for delicious eats.

This Moorish fortress has guarded Málaga from the slopes of Gibralfaro hill for nearly a thousand years.

The gardens and chambers of this Moorish citadel conjure memories of the Alhambra.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Abandoned railway line circling the city of Paris.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

Once a luxurious flagship of the Soviet Union, this Brutalist structure remains a landmark of Tashkent’s communist past.

Local authorities nearly destroyed this mural before a viral video rallied international support to save it.

This iconic cinema is home to Tangier's Cinémathèque and a symbol of the city's vibrant film scene.

Ancient Phoenician and Roman tombs carved into the rock overlook the Moroccan coastline.