World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

Nightmarish example of the unintended consequences of weapons testing.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Stunning examples of Russia's 18th-century wooden architecture.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

The exorbitant price of paradise.

Spanning over 10,000 square miles, this ancient salt pan is one of the largest on the planet.

There is only one place in the world where the corners of four nations come together.

A vast museum devoted to North Korea's victories against its imperialist enemies.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

North Korea's massive "hotel of doom."

A giant bronze monument to Kim Il-sung and Kim Jong-il is one of the most sacred sites in North Korea.

A controversial blue hoop has been puzzling freeway drivers since 2013.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

A small Denmark town displays a pair of titanic jaw bones as their community symbol.

Denmark's famous pseudo-hill.

The largest of Denmark's seven mysterious round churches stands on an island in the Baltic Sea.

A peat bog in southern Sweden provides a cozy and photogenic home for junked Volvos, Saabs, and the occasional American muscle car.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.