Once the largest attraction in Rhode Island, this former amusement park is now a gorgeous coastal state park.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

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

"A hideous albatross in the Hudson River Valley."

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

This historic Victorian hotel has a scandalous history of affairs and murder.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

Commonly referred to as the most photographed Victorian home in the United States.

On the Oregon coast there is a natural hole that seems to be draining the sea.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

The trials and tribulations of marking Poe's grave.

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

A crumbling hospital from the 1850s on Roosevelt Island.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

Remnants of a storybook amusement park hidden behind a strip mall.

Ship skeletons haunt Baltimore's waterways.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Step into a pastel time capsule where candy is truly dandy.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.