Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

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.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

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

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

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

One of the most scenic falls in Massachusetts has a history of death and grim legend.

The kind of mixed-up place that drives archaeologists crazy.

Etchings in a pile of boulders on the Long Island Sound are a monument to vanquished native peoples.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

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

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

Protecting the future of some of the rarest and most misunderstood mammals of North America.

Glacial erratic or man-made dolmen? It probably wasn't druids.

This whimsically unique butterfly farm focuses solely on creating habitats for the gentle insects.

A former copper mine which became a truly unsuccessful prison.

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.

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

A wunderkammer hidden on the top floor of the Hartford statehouse.