This contorting sculpture is the tallest in San Francisco.

A Saxony castle houses one of the largest and most outstanding mineral collections in the world.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

This woodland architectural installation acts as a camera obscura for the heavens.

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

Recovered from the brink of extinction, at home in the Financial District.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

The city's oldest Chinese restaurant offers local history and seriously good food.

This shop is named for a runaway elephant who smashed through its doors, stole some peanuts, and spent five days on the lam.

For decades, the parade of apostles that left the Expiatory Temple of Guadalajara remained hidden inside one of the towers.

This abandoned boat sits on a nude beach, is shaped like a UFO, and is covered in graffiti.

The sign at the garden gate reads: "These Plants Can Kill."

Experience park where visitors are told to expect the unexpected.