Ukrainian defense contractor's center for studying "pyramid energy."

Thousands of biblical and pagan images are carved into this small 12th-century church.

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

Russia's giant concrete QWERTY keyboard is likely the largest in the world.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

A small and surprising passageway in Saint Petersburg devoted to the Beatles.

Gargantuan home of Russian science.

This massive monument honors the first human in space.

Stalinist skyscraper built with help of cryotechnology.

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

A 360 degree battlefield experience.

Home of the future Emperors of Russia.

Some Moscow residents once claimed the bizarre, contorted mass of metal on top of the building was used to manipulate minds.

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

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

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

Dozens of padlock-trees along the Moscow River.

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

The world's first museum dedicated to the work of game-changing naturalist Charles Darwin.

The avant-garde design was able to bypass strict Soviet regulations on architecture.

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

An early-20th-century "dacha" village of quaint cottages curiously located in a modern part of Moscow.

Moscow's imposing monument to the Space Age.