Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

The fossilized remains of ancient California redwoods.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

The liveliest ghost town in the state.

An optical illusion found amid a logged redwood forest.

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

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

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Ingenious bakery opens up the first Cupcake ATM at their flagship location in Beverly Hills.

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

The unbelievably opulent home built for an infamous newspaperman.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

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

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

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

The ghost town that ended up on Ebay.

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

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

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

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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