One time home to turn of the century explosives, now hidden under the Bay Bridge.

The original place where water met land in the City by the Bay is outlined in brass.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

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

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

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

Tiki luxury on Nob Hill.

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

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

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

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

Nuclear reactor created the plutonium used on Nagasaki.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

A smoke stack so large, the Washington Monument could fit inside!

A little-visited ghost town state park offers a glimpse into Montana’s "Silver Queen."

The old fire tower is one of the last of its kind in the United States.