A Roman-inspired temple once controlled half of San Francisco's waters.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

A porcelain company's former dumping ground, completely covered in pieces of collectible ceramics.

Where a staggering 747 ships were constructed during World War II.

Internationally-recognized arts center housed in a century-old former military barracks.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.