The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Only hotel where you can legally launder money.

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

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

An essential stop before plundering, BYO Cutlass.

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

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

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

Its buzzing collection honors vibrator history.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

A Bibliophile's Dream.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This woodland architectural installation acts as a camera obscura for the heavens.

This research center for rare prosimians is studying how they sleep to help prolong human life.

A speakeasy takes on Chicago's drinking culture.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Dr Barnes' $25 billion private collection of art and arboretum.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.