Gargantuan home of Russian science.

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

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

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

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

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

Church built on the site where the last tsar of Russia and his family were killed.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

An ancient necropolis of magnificent tombs.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

This winding road through an Italian canyon may be the most scenic drive in the world.

The celebrated eyesore created by starry-eyed sweethearts.

Giant topiary dog once played a role in a terrorist bomb plot.

An Italian hillside ghost town.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.