The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The legendary building that needed ghostly approval before being built.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Dramatic river bend surrounds a natural red-rocked pedestal.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

An exquisite tunnel of cascading flowers.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

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

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

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

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

This museum explores the history of policing and is also home to a very popular taxidermied duck.

As communication goes completely wireless, this Maine museum remembers all the wires that got us to this point.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

A giant donut stands as a popular symbol of Los Angeles iconography.

World-famous, Pink's still manages to keep its prized cult fetish status.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

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