This municipal playground was co-created by the father of one of the most playful characters ever.

340 bicycles, 65 feet high.

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

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

A living time capsule of the 1960s Richardson Bay water-front.

Dive bar built out of the remains of a whaling ship.

A vast city of the dead, where the deceased outnumber the living by more than a million.

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.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Visible below the waves are memorials to the city's Gold Rush dead.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

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

Early prototype for Frank Lloyd Wright's Guggenheim.

Half of a house.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

Furniture tries to escape an abandoned building in San Francisco.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

A motel dedicated to Southwestern nostalgia.

Mysterious glowing orbs float through the desert night.

The last Americana on Route 66.

Megachurch turned Catholic church comprised of 10,000 glass panes.