A decaying, yet still functioning, work of communist architecture.

An homage to the medieval rulers of Bulgaria.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

"Unity, Creativity, Beauty."

"Holy Wisdom" overlooks the city that became its namesake.

A vast Communist-era exhibition space in the Bulgarian capital.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A striking symbol of the Bulgarian capital.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

This collection of reclaimed landmines acts as both an exhibition of their deadly history and as a shelter for children affected by them.

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

A quick and simple solution to Cambodia's train woes.

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

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

Khmer Rouge's high security prison.

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

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

A hidden three-foot-wide house separates these two regal churches.