This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Open-air museum with a large collection of Soviet-era statues.

Museum dedicated to the terror regimes of Hungary.

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

Space-age monument to an early 20th-century uprising.

Mysterious spherical rocks in the semi-desert of western Kazakhstan.

An entertainment center in a huge transparent tent.

An abandoned Soviet-era park that, when viewed from the air, looks like a pentagram.

Iconic pyramid from famed British architect Norman Foster designed to represent all of the world's religious faiths.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

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

Rock-cut chamber at top of an outcroup, reached by a mountain stairway of forty steps.

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

Splashes of blue in an otherwise monotonous lunar landscape.

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.

Final palace complex of the last of 29 Kokand rulers.

Where Stoddart and Connolly suffered in the infamous Bug Pit.

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

Looking for a unifying history, Uzbekistan finds its answer in a 14th Century Turco-Mongol conqueror... despite the fact he wasn't Uzbek.

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

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

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