Golden Gate Park's historic collection of plants.

This private residence was the template for one of the most beloved television homes of all time.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

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

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

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

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Tiki luxury on Nob Hill.

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

Olfactory delights in San Francisco's Botanical Gardens.

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

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

Lucha Libre (Mexican Wrestling) themed taco shop.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

The oldest structure in a beachside California city was built to serve eight students.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

These unusual houses look like giant boats that washed ashore on a residential street.

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

Outsider art or homage to aliens?

Special tunnels built so that frogs won't be killed when crossing the highway.