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

A scale model of Russia so big visitors are offered binoculars to rent so they can see the whole thing.

This frozen-in-time summer home outside Moscow provides a look at Russian life in the 1950s.

Museum design and public transportation meet in this unique Russian train car.

The tallest hotel in Europe.

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

Moscow's imposing monument to the Space Age.

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

Former headquarters of the KGB.

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

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

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

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

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

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

Palace where the nearly un-killable Rasputin was murdered.

Immortal combat in a Moscow museum.

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

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

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.