A small museum packed with specimens from important fossil sites and minerals from historical pegmatite quarries.

A 30-acre garden inspired by the principles of modern physics.

The mansion home of author Edith Wharton.

Books you don’t need in a place you can’t find.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Trash escaped from a landfill to fill beaches with all kinds of treasure.

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

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

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

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

Over fifty whirling pools left by the glacial age.

Three prestigious academic collections come together to create a world-class natural history museum.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

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

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

An eccentric inventor's castle home with its own indoor weather system.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

This magnificent Japanese garden provides a moment of Zen in rural Vermont.

All that remains of the Whittall mansion are the ruins of the formal garden and its pergola, dedicated to the late Matthew J. Whittall by his widow.

One of the first commercially successful anthracite-powered iron-making operations in North America.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

This abandoned Victorian-style house was built in 1884.