The palace of the King of Kings, burned by Alexander the Great.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

One of the world's tallest statues is also one of its most hated.

Stalinist skyscraper built with help of cryotechnology.

Home of the future Emperors of Russia.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

The tallest hotel in Europe.

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

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

Former headquarters of the KGB.

Moscow's imposing monument to the Space Age.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

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

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

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

Palace where the nearly un-killable Rasputin was murdered.

An ever-growing literary collection housed in the apartment where the Russian author penned his final novel.

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

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

Russia's own leaning tower was built on a tragic historical fable.

Replica of mosque destroyed by Russia in the 16th century.