This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This ancient market is often referred to as the oldest shopping mall in the world.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

A pair of connected skyscrapers form this symbolic gateway.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

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

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

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

This once-derelict building is now one of the most beautiful bookstores in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

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

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

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

Nicknamed Kazakhstan's Grand Canyon, this natural wonder lies east of Almaty near the Chinese border.

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

Once a luxurious flagship of the Soviet Union, this Brutalist structure remains a landmark of Tashkent’s communist past.

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

An 18-meter-long sarcophagus of a constantly growing dead prophet.