The oldest living tree in Manhattan comes shrouded in sinister legend.

Abandoned power station once home to a squatter community, now being developed into an arts center.

The largest Chinese cemetery in the world outside of China dates back to the 15th century.

Giant relaxing Buddha in Malaysia.

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.

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

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

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

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

At this rare mosque in Tbilisi, Sunni and Shia Muslims pray side by side.

A museum glorifying the life of Stalin, located in the city of his birth.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

Unusual building appears to be haphazardly built from randomly piled bricks.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Ancient rock-hewn town that witnessed key events of Georgian history.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

A marvel of Byzantine engineering under the streets of Istanbul.