What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

This sprawling woodland estate was the brainchild of iconic American industrial designer Russel Wright.

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

A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.

A distillery built on (and above!) mobster Dutch Schultz's Prohibition-era underground moonshine business.

This forlorn park is the result of a failed investment turned tax dodge.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

Underground tunnels remain beneath this abandoned mental asylum.

Ruins of a historic medical facility sits eerily by the water.

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

This once-private estate is now a dreamy, meditative garden that's open to the public.

House used in the 1971 horror film "Let's Scare Jessica to Death."

A former copper mine which became a truly unsuccessful prison.

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

This lovely hilltop tower was specifically built to withstand 100 MPH winds.

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

Who knew the Devil's domain was a hot spot for tubing?

The cave where two British judges hid in exile after sentencing the king to death.