Colorful Native American paintings are hidden within this small cavern.

The ruins of the castle that chemicals built.

A stellar example of Art & Crafts architecture, and a movie set to boot.

A landmark for a trailblazer for female architects and the designer of one of the most famous and opulent buildings in California.

An Airy Would-Be Solution to a Housing Shortage.

This museum honors the first Spanish land grant in California which is still in the hands of the original owner's family.

Olfactory delights in San Francisco's Botanical Gardens.

An old-timey medicine shop that once served Chinese laborers during the Gold Rush is still open for business to this day.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A ruined hotel with an unlucky history and an eerie present.

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

Wool processing mill in an unlikely location.

A statue commemorating the heroic life of a Viking postman who was the Godfather of California skiing.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

One woman's Viking Castle on Lake Tahoe.

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

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

A fine mixture of the old and the new topped with an art deco neon spire.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

One man's love of natural beauty led to the creation of this hidden granite monument.

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