A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Depression-era fun lives on in this Harlem museum dedicated to the sport of the street.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

A hidden "place of interment for gentlemen."

A creepy steel gremlin has protected the Bay Bridge since 1989.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

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

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

A free, public museum dedicated to the fascinating science of sight.

Faceless white figures loom over the city from the rooftop.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

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

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.