This "floating railway" is one of the world's oldest monorail systems.

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

A unique attraction and museum dedicated to exploring iconic roadside structures.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This isolated island is often capped by its own fluffy cloud.

A subterranean playground in an abandoned slate mine.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

A peaceful international sculpture garden in upstate New York.

A once grand hotel is being retaken by the wilderness it once capitalized on.

An eerie, derelict amusement park in Berlin.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

Obscure and obsolete publications are given new life as works of art.

“Invented in Key West, Perfected in Brooklyn."

This massive redwood tree has a hole in the base big enough to drive through.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A bizarre house filled with an astounding array of collections.

400-year-old garden, restored to beauty.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.