This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

The unbelievably opulent home built for an infamous newspaperman.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The oldest surviving wood-frame building in North America is still in the family.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Twelve natural mummies are displayed in the crypt of this former monastery school.

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

Medical and zoological curiosities for sale.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

This black shoreline is made up of exploded lava particles.

Museum preserving torture methods from the past.

World's largest collection of serial killer artwork and other macabre exhibits.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A Nesting Doll of Churches.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A terrific purveyor of natural history objects and curios.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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