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

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

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

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

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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

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

A huge musical instrument played by the ocean.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The blinking light atop the iconic landmark has been sending secret messages for decades.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

A Cold War site complete with rusty structures, hiking trails, and beautiful views.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

A master of deception, Harry Houdini's greatest trick may have been living in two places at once.

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

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.