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

A grotesque Fiji merman dwells within this traditional Dutch-style building.

The secret city built by the Manhattan Project.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

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

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

This candy-striped tower is the farthest east you can go in the United States.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

Try a classic Necco candy bar being resurrected in a small suburban shop.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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

The taxidermy remains of the most popular pony in children's literature.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Yo, Adrian!

An Irish Memorial commemorating those who perished due to potato blight.

This elaborate towering structure was once famed for its revolutionary height.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The first American department store, and home to the largest operating musical instrument in the world.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.