A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A winding path built in secret on the edge of the continent.

This shop specializes in oddities and Victorian-inspired wonders.

A psychedelic labyrinth on the San Francisco bay.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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

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

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

A huge musical instrument played by the ocean.

A lone bronze figure stands in memory of historic a 19th century land grab.

This abandoned Abraham Lincoln statue has also earned the honorary of "World's Ugliest."

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

Moving, mind-blowing metal sculpture work of an outsider artist.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

The house is an iconic pilgrimage site for fans of the Illinois-based emo band.

One of the largest carillons in the world, this giant instrument has 67 cast-iron bells played by a keyboard.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

A chance to follow in the footsteps of the word's most legendary animator.

The famous Beatle secretly visited this Illinois town several times to visit his sister.

The sign to a demolished amusement park now stands in front of a local library.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

The carved remains of a 200-year-old oak tree memorialize the namesake of the iconic "Wizard of Oz" character.