Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

View the California coastline (and the home of Barbara Streisand) inch by inch with stunning, government-sanctioned aerial photography.

Make sweet music as you walk through this interactive sonic sculpture.

Explore more than 130,000 new and used books in the "world's largest outdoor bookstore."

A massive volcanic plug is now a protected area that hosts a number of bird species.

The unbelievably opulent home built for an infamous newspaperman.

A giant statue perched on dumpsters watches over the freeway.

At night, this glittering musical tunnel draws skaters and photographers.

It is locally loved and ridiculed for literally looking like poop.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

Eight huge lanterns lining a city street can change color on command.

Radioactivity still cause for concern at this urban explorer's paradise.

Amazing meticulous gardens of personal wood carvings, Hydrangea, Canna, and many other flowers.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Gold Rush-era tombstones line the park's paths.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The remains of a ruined mansion memorialize the 1906 earthquake.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Once the site of speeding horses, now home to picnickers and public concerts.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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

Once the largest windmill outside of Holland, with enormous 114 foot sails.