This subterranean necropolis holds three floors of antler-dug grave caves.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

Italian cave with exceptional acoustics and an unsavory history.

The world's most active stratovolcano is almost always erupting.

142 ceramic steps become a mosaic once a year.

For lovers of Soviet cinema, this museum is home to a vast collection of artifacts and costumes.

This massive monument honors the first human in space.

A monument to Malchik, a stray dog who lived in a Moscow metro station until his tragic death.

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

Gargantuan home of Russian science.

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

Stalinist skyscraper built with help of cryotechnology.

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

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.

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.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.