The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

A Manhattan office building is home to the world’s largest chess board.

New York City's first Modernist house.

Read a book next to a Midtown waterfall.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Wedged between two sets of row houses is an awkwardly located family graveyard.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

The building was originally a gas station built to resemble a Japanese tea house.

Whimsical sculptures dot a woodland path surrounding their creator's old summer cottage.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

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

A Barbary Coast watering hole built into a Gold Rush shipwreck.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

The oldest alley in San Francisco is paved with a reminder of the city's original shoreline.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

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

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

Wander down a side street dedicated to one of the members of the Beat Generation.