The ill-fated plan to reroute the Mississippi so that Union ships could bypass Confederate fortifications on the river bend.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

Once home to a booming 19th-century oil town, the park now houses a World War II submarine memorial complete with a torpedo.

This is one really big nut.

This old abandoned sign flickers to announce a motel that isn't even there.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Pennsylvanian mass grave and possibly mass murder.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

Alexander Hamilton’s creation caused quite a bit of controversy.

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

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 US Navy's only submarine museum is also home to the world's first nuclear submarine.

A castle built for love, and abandoned due to heartbreak.

The largest collection of historic military firearms in the United States.

One of the only memorials dedicated to journalists who died in combat.

This historic lighthouse was well known for the large number of women who served as its keeper.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

It would take 35 firetrucks to fill this enormous glacial pothole.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

An innovative attempt to break a siege in the American Civil War still scars the earth today.