A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

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

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

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

San Francisco's first World's Fair, dedicated to the wonders of California.

A monumental cross hides in the trees in Golden Gate Park.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

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

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

A modern mechanical planetary system, part of a 10,000 year clock.

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

A museum befitting the city responsible for supplying the majority of the world's LSD.

A 140-year-old castle with underground caves hidden in San Francisco.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

World's largest collection of serial killer artwork and other macabre exhibits.

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

A huge musical instrument played by the ocean.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

A river with some unusual, and occasionally dangerous, habits.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.