Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The oldest continuously inhabited street in America.

This mouldering abandoned mental hospital was once a center for progressive healing.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

A crumbling hospital from the 1850s on Roosevelt Island.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

A memorial to a shareholder activist feared by CEOs around the United States.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

Decades before the scandal, this staircase on the river was a literal "water gate."

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

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

The tomb of history's greatest potato promoter is surrounded by tubers.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.