Antiques by the Bay.

Playable, historic pinball machines fill this Alameda museum.

A storybook European village in Berkeley.

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

A museum befitting the city responsible for supplying the majority of the world's LSD.

Furniture tries to escape an abandoned building in San Francisco.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

An overlooked and unassuming engineering marvel.

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

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The only theatre in the world constructed specifically for sound movement.

Half of a house.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Golden Gate Park's historic collection of plants.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Floating man-made island and upscale restaurant.

Art in the form of a winding, man made crack in stone.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

A hidden subterranean installation offers a view of the sky.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The remains of a ruined mansion memorialize the 1906 earthquake.