A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

A Roman-style column in Oregon hides a spiral staircase inside.

Two massive rock outcroppings on the Oregon coastline.

A sculpture of a salmon swimming through a brick building.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

An institution that preserves the history of institutionalization.

Only known mainland rookery of the threatened Stellar sea lion.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

A heavenly experience, right here on Terra Firma.

A 1950s Googie burger stand is now a Los Angeles landmark.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

This Alamo Square mansion is rumored to have hosted satanic rituals and other occult practices.

The man who voiced Bugs Bunny, Daffy Duck, Porky Pig, and more has a headstone reading, "That's all, folks!"

This once-booming Gold Rush town is now home to a herd of feral donkeys.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

The lead horse on a Disneyland merry-go-round that is older than the park itself.

The world's first motel is now an administrative building for an apple farm.

This 19th-century church is now a popular roller rink.

Dive bar built out of the remains of a whaling ship.

Playable, historic pinball machines fill this Alameda museum.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

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

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.