Golden Gate Park's historic collection of plants.

A century and a half of research in the sciences and natural history, still going strong.

Over 315,000 preserved amphibians and reptiles in jars.

Guns that have been defending San Francisco since 1904.

This turn of the century masterpiece has a mysterious goaty interloper.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

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.

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

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

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

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

A man-made island in scenic San Francisco Bay.

Masterful ceramic fountain and map of the Pacific Basin.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

An vast warehouse of everyday treasures in Berkeley, CA.

The former Naval shipyard is open for exploring - mostly.

The oldest Naval cemetery on the West Coast.

A historic hotel in an old California railroad town with a rowdy reputation.

Where the polar bear watches over everything, and every drink is a double.

Dentist's hated concrete colossi are now beloved icons of the community.

The rusting remains of the largest assembled WWII fleet on the West Coast.

The largest drain hole in the world.