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

A store that sells all manner of bones, insects, and animal curiosities.

Private collection of art inspired by cabinets of curiosity.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

The home of 1.5 million wood letters for printing is still a functioning workshop.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

An art museum with an eclectic design and a scandalous past.

Medicinal spa created with the discharge from a geothermal energy plant.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

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

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

The remains of a 12th-century chapter house in Golden Gate Park.

An overlooked and unassuming engineering marvel.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

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

A 140-year-old castle with underground caves hidden in San Francisco.

A 90-acre park on former landfill that hosts an annual kite festival.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

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

San Francisco Bay's ghost town.