This municipal playground was co-created by the father of one of the most playful characters ever.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

This former boomtown "island" is now submerged below Folsom Lake.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

A working miniature city designed to teach kids about safety and presumably city planning.

The California capital city once stood 10 feet lower than it does today.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

The rusting remains of the largest assembled WWII fleet on the West Coast.

California's own majestic geyser is powered by a subterranean volcano.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

Megachurch turned Catholic church comprised of 10,000 glass panes.

A popular tourist cave with a dark past.

An extensive collection of ancient Egyptian artifacts and mummies.

The unbelievably opulent home built for an infamous newspaperman.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The largest drain hole in the world.

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

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

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

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

San Francisco's newly reopened hands-on science museum.