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

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

Its buzzing collection honors vibrator history.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

An overlooked and unassuming engineering marvel.

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

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

Tiki luxury on Nob Hill.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

Recovered from the brink of extinction, at home in the Financial District.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

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

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

A promotional sun clock on the site of San Francisco's great raceway.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

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

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

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

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

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