An urban laboratory.

Cambria's most unique B&B features creative surroundings and fantastic food.

A Mysterious Masonic tomb in San Luis Obispo.

A deserted hodgepodge of experimental structures designed by nearby university students.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

This small-town Connecticut restaurant gives each diner a free book from its vast library.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

Magical-looking cottages that inspired one of the most famous animated films ever.

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

Rainbow-hued local gem in Venice.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

One man's homage to the sun continues to grow like a glass fractal.

One of the last free public hot springs is decorated with hippie art.

A map of Italy made entirely of trees.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This 16th-century monastery has been turned into a surrealist architecture compound.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

A 16th-century horror show built in a lovely Italian garden.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.