An observatory with a 54-meter-wide radio telescope sits in the mountains of Armenia.

Armenia's premier center of astrophysical research was established during the Soviet era.

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

With over 10,000 lights, this engineering marvel lights up the city after dark.

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.

This extraordinary, multi-pillared monument depicts the fascinating history of Georgia.

The decaying remains of a once-luxurious Soviet spa town.

Ancient rock-hewn town that witnessed key events of Georgian history.

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

A 11-foot former president stands on a Kosovo street that also bears his name.

A futuristic, brutalist masterpiece that is also strangely prison-like.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

The site of a legendary 14th-century battle and a controversial 20th-century speech.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

Two distorted Romanesque columns hold aloft a mine cart in honor of laborers who died during WWII.

This peaceful park with centuries of history hides in an overlooked section of South London.

When the Soviets destroyed the historic Armenian monastery they somehow left its bell tower intact.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

If you dare visit this fort, fire-breathing hyenas might devour your camels.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

The remains of Crystal Palace Great Exhibition of 1851.