This shallow cave got its name from copious amount of human bones found inside.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A winding district gerrymandered into the shape of a mantis.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

FDR's Art Deco hospital tower was hopelessly inefficient.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

Proto-CIA agents trained with grenades in the sand traps and fired machine guns from the fairways.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The land is home to swimming ponies and a legendary 18th-century treasure.