This remnant of an ancient Persian city is considered to be the world's largest single-span brick vault arch.

Giant reed houses made in the marshes of Southern Iraq.

A shrine on the shores of the Tigris.

This road earned its macabre nickname after hundreds of Iraqi troops died along it in 1991.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Fortified homes of highland warriors that are still in use today.

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

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

Museum dedicated to overthrowing the Soviets, complete with diorama of Soviets being beaten to death with shovels.

The abandoned palace stands as a wounded but proud beacon of Afghan hope.

Despite a history of destruction, this former citadel survives to document Afghanistan's oft overlooked history.

Highly unusual subterranean stupa and adjacent cave monastery.

Once an impressive link to Afghanistan’s Buddhist past, now a sad reminder of intolerance towards other cultures.

You'll find just about anything in this funky Tbilisi flea market.

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

A lively circle of dancers in the Georgian capital commemorates an ancient rite of spring.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

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

Splashes of blue in an otherwise monotonous lunar landscape.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

Legends surround this jagged rock formation in the New Mexico desert.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.