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

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

NASA's leading space science lab started by a co-founder with deep ties to the occult.

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

Guns that have been defending San Francisco since 1904.

Historic funicular railway, believed to be the shortest railroad in the world.

Concrete strongholds stand guard over the Golden Gate.

An alley covered with 20 years of bubble gum.

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

A huge musical instrument played by the ocean.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Explore 10 acres of environmental sculptures.

A modern day curiosity cabinet.

Shop selling 500 flavors of soda has something for everyone.

Church and home-museum of a 1920s female revivalist preacher with a very sordid past.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Storybook cottage in Beverly Hills was once the site of 1920s silent film studio, affectionately known as "The Witch's House."

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

A museum, art project, and institution that demands we look at the world around us in a strange new way.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.