The ancient remains of this natural fortress can still be found along the Silk Road looking surprisingly preserved.

The highest monastery in the world operates a tiny guesthouse with doors open to all.

A lush desert oasis in the shape of a narrow crescent.

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

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A former French military respite turned jungle tourism hotspot.

A battle between nature and architecture in the Cambodian jungle.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Singapore's landscaping project is home to 18 incredible Supertrees.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

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

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

An old slave lookout in Cuba's historic sugar cane fields.

Neo-cave art on the macro scale.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

The largest stone moai on Rapa Nui.