One of only two commuter aerial tramways in the United States.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

This decrepit abandoned building is made all the more eerie by its dark history.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

The abandoned coal loading dock is a canvas for unsanctioned art.

The oldest surviving botanic garden in the United States.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A psychedelic labyrinth on the San Francisco bay.

This uninhabited island in Maine is home to various works of art left by visitors over the years.

Cheap art and political theater in Vermont.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

This enormous abandoned factory is now a makeshift graffiti gallery.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Unique antiquarian shop specializing in globes, maps, and prints.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

Most-visited and most-photographed slot canyon in the American Southwest.

A crumbling hospital from the 1850s on Roosevelt Island.

Rippling sand dunes frozen in the Arizona rock.