The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.

Nuclear reactor created the plutonium used on Nagasaki.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

The sail of the first nuclear sub to circumnavigate the world.

A stunning landscape of bunkers that once stored chemical weapons.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

So many migrating birds roost on the bridge, it has a special summer speed limit.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

During World War II, blimps were a key part of the United States' defense against German U-boats—this building could house a dozen of the armed airships.

Granite outcropping that the state's tourism bureau doesn't promote because of its delicate ecosystem.

The last refinements in the North Carolina-South Carolina boundary were marked with this stone.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Nancy Thompson's Home from "A Nightmare on Elm Street."

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

The wooden airship was the largest flying boat ever built.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The North Carolina grounds are leased in perpetuity to the British Commonwealth for as long as the WWII sailors are buried there.

The Cadillac Ranch for monster truck aficionados.

A maritime museum holding the remains of Blackbeard's pirate ship.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A forgotten sea village stands silent after hurricanes deemed it obsolete.

Some North Carolina Cherokee have been keeping their history alive for decades with a single play.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.