This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

The echoes of a railroad town that solemnly mark the end of the line.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This giant temperature attraction created some giant electric bills.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

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

An optical illusion found amid a logged redwood forest.

The unbelievably opulent home built for an infamous newspaperman.

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

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

One of few surviving standpipe water towers in the U.S.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Less a museum than a bizarre fantasy world created by artists and engineers.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

San Diego's most historic and haunted home.