The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

A condom-covered Thai restaurant that is more concerned with birth control than food.

Derelict airplane bodies serve as both home and income for three Thai families.

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This Vietnamese bar doubles as a multistory labyrinth.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

Once the largest rope factory in Greece, this abandoned plant now stands like a ghost of industry past.

An abandoned Byzantine fortress and notorious prison.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

This ancient structure appears Roman, but was constructed during the 16th century and was utilized until 1911.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

A naturally beautiful, seemingly bottomless deep blue spring.

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

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

The capital of Cambodia is named after the hill on which this ancient temple complex stands.

Khmer Rouge's high security prison.

One of the biggest markets in Asia, under one of the continent's largest domes.

A battle between nature and architecture in the Cambodian jungle.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.