Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Colorful Native American paintings are hidden within this small cavern.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

An extensive collection of ancient Egyptian artifacts and mummies.

This enchanting mountain plateau celebrates spooky local folklore.

In this century-old literary safehouse, print is alive and well.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

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

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

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

Olfactory delights in San Francisco's Botanical Gardens.

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

This shop specializes in oddities and Victorian-inspired wonders.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

A winding path built in secret on the edge of the continent.

A 140-year-old castle with underground caves hidden in San Francisco.

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.