The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

A beautiful 62-acre Catholic shrine and botanical garden.

This charmingly homemade amusement park has been growing for 40 years.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

On the Oregon coast there is a natural hole that seems to be draining the sea.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Half of a house.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

The only theatre in the world constructed specifically for sound movement.

A psychedelic labyrinth on the San Francisco bay.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A huge musical instrument played by the ocean.