This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

Mass grave of 50 unidentified French Soldiers who died at the Siege of Yorktown, 1781, that gave victory to the American Revolution.

The location where the American Revolution ended.

This unassuming home played a pivotal role in American history, essentially putting an end to the Revolutionary War.

A small cave with a larger-than-life legend.

This museum explores the grim reality of life in the earliest British colonies in America.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Venture into the past with an unlisted exhibit hall featuring extinct birds.

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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

One of the oldest of its kind.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

A sacred collection of indigenous rock art.

This might just be the TARDIS of bookstores.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The oldest surviving botanic garden in the United States.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

A local prank turned town icon.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

This dramatic rail curve was once the target of a failed Nazi attack.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

The historic home still shows the scars from a little run-in with the British in 1813.