A popular 19th-century natural landmark is now hidden within a sprawling forest.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

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

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

This historic cemetery is filled with markers that look more like candy than was likely intended.

Supposed Massachusetts Grave of a pre-Columbus Knight Templar.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Abandoned Italianate architecture on the coast of Maine.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

The world's largest rotating world.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

The mansion and cenotaph of the New Hampshire Faust.

America's oldest archaeological site or a muddled case of wishful thinking.

The site of the Andover Witch Hunts, which ended with more witch accusations and arrests than Salem.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

Stumps of an Ice Age forest, visible only at low tide.

Final resting place of the two women killed on a small island off the coast of New Hampshire.

Scene of the grisly murder of two Norwegian women in 1873.

This picturesque abandoned home is rumored to be a spite house.

The Atlantis of Cape Cod reemerges during the lowest of tides.

35,000 grape hyacinths flow like water down a garden hill.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.