The highest dunes in California are the most likely place in the area to hear the Singing Sands.

Golden Gate Park's historic collection of plants.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

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

The site of murders and Satanic cult gatherings.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The largest drain hole in the world.

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

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

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

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Visible below the waves are memorials to the city's Gold Rush dead.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Quite simply the largest tree in the world (by volume).

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Towering basalt columns, a creation of fire and ice.

The ghostly remains of an accidental sea.