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

The remains of an ancient city-state along the Silk Road.

This dark, damp, perilous tunnel is the only passage from north to south Tajikistan.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

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

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

A battle between nature and architecture in the Cambodian jungle.

A non-profit that uses the impressive smelling abilities of African Pouched Rats to find and clear unexploded land mines.

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

A former French military respite turned jungle tourism hotspot.

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

Khmer Rouge's high security prison.

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

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

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Vietnam's largest Buddha statue depicts a female sage.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

The largest hydroelectric project in Laos created this eerie landscape.

A boat ride through utter darkness, lit only by headlamps, reveals an emerald green pool locals believe is sacred.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

The world's only museum devoted to the wonders of fluorescence.