With over 12,000 different species of plants, this botanical garden is Japan's oldest and most diverse.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

The middle finger of modernity.

A crumbling hospital from the 1850s on Roosevelt Island.

World's first "penitentiary," meant to be humane, drove men insane.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Rippling sand dunes frozen in the Arizona rock.

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

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

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

A terrific purveyor of natural history objects and curios.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The sign at the garden gate reads: "These Plants Can Kill."

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Eighty million natural history specimens call this gargantuan museum home.

A tongue-in-cheek arcade where the games are based on everyday life.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A kaleidoscopic warehouse-maze of handmade neon signs.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

Long before mobile phones or GPS were available, these sentry boxes provided help for motorists in need.