A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A small medical museum with a recreated doctor's office.

Gorgeous purple flowers drape from the world's largest blossoming plant.

Celebrating the transformation of trash into objects of beauty.

This 19th-century church is now a popular roller rink.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

A hidden world of exotic succulents and cacti.

360-degree virtual reality chamber physically immerses scientists into their data.

San Francisco's most expensive hotel suite includes a secret passageway rumored to have been used by JFK.

Nuclear waste dump site now an environmental sanctuary.

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

Legendary prop shop filled with one man's collection of scientific curiosities.

Dive bar built out of the remains of a whaling ship.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

The beautiful 1920 Pantages Theatre remains hidden just underneath the LA Downtown Jewelry Exchange.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

Two men, two visionaries of Venice Beach, one little hotel that smells like cookies.

A quirky collection of figurines backdropped by city views is hidden next to a popular restaurant in the Hollywood hills.

From Japan to Italy, this California park explores the world's cultures through their gardens.

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

A giant donut stands as a popular symbol of Los Angeles iconography.