A monument to the love people have for their pets.

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

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

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

Once the gateway to the utopian dream-village of a Civil War embalmer.

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.

One of the last remaining Carpenter Gothic churches is situated on a wildflower conservatory overlooking the bay.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

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.

Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

Radioactivity still cause for concern at this urban explorer's paradise.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Playable, historic pinball machines fill this Alameda museum.

This (occupied) house is 10 feet wide and full of spite.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

Location of the most powerful laser in the world, and the potential birthplace of tiny stars.

A unique piece of graffiti offers a little slice of local history and mystery.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

The longest burning light bulb in the world.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

A comprehensive collection of Pez dispensers.

The world's first permanently occupied mountain-top observatory continues to report on the stars.