A little-visited waterfall in an otherworldly landscape.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

A crumbling hospital from the 1850s on Roosevelt Island.

A forsaken wonder in the middle of the East Side neighborhood.

This historic railway museum may have lost its passengers but not its love for trains.

This abandoned ironworks was once the most important military supplier in America.

All that remains of a magnate's dream home is a historic gate and an abandoned public pool.

This graceful little figure is a one-of-a-kind version of the cherished character.

The former estate of the Guggenheims, part of the opulent Gold Coast that inspired the Great Gatsby.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

Eclectic musical collection ranging from hurdy gurdies and orphicas to the Rolling Stones Mobile Studio.

Outsider art meets hard scrabble mountain life in this woodcarver's home/art piece.

A small and quirky museum hidden inside a fence.

Mysterious stone tower featured in many alternative histories of the New World.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

Abandoned Coast Artillery fort now serves as graffiti canvas and sightseeing vantage point.

A failed, un-built suburb that has been going feral for decades.

Jacksonville's highways rendered this century-old grammar school unusable.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

A recently abandoned psych ward at the end of Sanatorium Road.