Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Try not to get slimed in Tribeca.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

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

A second generation sun-powered marvel lights up the night.

Concrete strongholds stand guard over the Golden Gate.

A shining, cold, black organ lies in San Francisco's financial district.

A man-made island in scenic San Francisco Bay.

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

Golden Gate Park's historic collection of plants.

This private residence was the template for one of the most beloved television homes of all time.

The miraculous hydrant that saved the Mission District in 1906.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

A monument to the love people have for their pets.

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

A 300-ship graveyard, with a few still visible at low tide.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A winding path built in secret on the edge of the continent.

A huge musical instrument played by the ocean.

Home to the "Circus" trees created by Axel Erlandson.