A castle that was built stone by stone by an eccentric journalist.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

A strange house built only at night, with rumored mystic inspiration.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Olfactory delights in San Francisco's Botanical Gardens.

A one-of-a-kind collection of a unique medium.

Its buzzing collection honors vibrator history.

Rainbow-hued local gem in Venice.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

This weird abode has inspired everything from the "House on Haunted Hill" to a robot hunter's pad.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

America's most famous piece of self-built architecture.

A psychedelic labyrinth on the San Francisco bay.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

Make a wish at what might be America's only Catholic shrine to a sinner.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

An out of this world experience.

Inside this store, a mysterious statue draws visitors from the world over.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.