This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This room of wonder is full of relics, from knights in armor to rare works of art.

One of seven Jewish catacombs in Rome and one of only two open to the public.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

One of the world's largest collections of rare and magnificent bird specimens.

The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Rainbow-hued local gem in Venice.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Medical and zoological curiosities for sale.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A gigantic 10-foot tall stone man.

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

A storybook European village in Berkeley.

Antiques by the Bay.

Spiral labyrinth hidden in the hills above Oakland, CA.

This hidden labyrinth offers walkers some brief peace of mind.

The world's longest known cave system.