The key to turning shifting dunes into the green oasis of Golden Gate Park.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

Legendary frontman of the Doors looms in this giant mural by famed Venice muralist, Rip Cronk.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

The short oil boom of Venice Beach, and its swift removal from the tourism-laden landscape.

A sculpture of a flying hawk made from colorful car doors.

When life gave this firefighter a forest fire, he made a rough-hewn sculpture park using a chainsaw.

One man’s passion for gas stations is on display along the Rio Grande in northern New Mexico.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Traditional 15th century Chinese garden in the middle of Vancouver.

At just six feet two inches deep, it is said by Guiness and Ripley to be the world’s narrowest freestanding office building.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.