The flow from this waterfall sometimes comes out of springs below its rim.

California's longest-running tourist attraction is a stump.

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

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

Oakland's beautiful monumental cemetery.

A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

San Francisco's newly reopened hands-on science museum.

Cavemen, elephants, and eagles greet passengers driving through the town's main intersection.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

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

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

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

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

Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

One of the last free public hot springs is decorated with hippie art.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

360° views of the city plus five floors of optical illusions and hands-on science.

This beloved roadside attraction welcomes visitors with his signature neon smile.

One woman's Viking Castle on Lake Tahoe.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

The most beautiful Taco Bell in the world even has surfboard parking.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

A giant chess set, minus the psychedelic drug trip.