A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Resonating tubes make music from highway overpass.

This abandoned neighborhood is now a park filled with beautiful trees, wildflowers, and hints of its past.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This roadside wonder is as mysterious as it is beloved.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The mounds at this site were reconstructed with the help of archaeologists and historians.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

The site of the one and only battle of Lord Dunmore's War.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

The highest point in Virginia can only be reached by passing through ponies and flowers.

A 100-foot metal tower and swinging bridge that provides stunning views of mountains in five states.

This tower was once used to create ammunition for early settlers.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.

The remains of what was once the world's steepest passenger funicular.

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

Locals say Williams' ghost still haunts the place where she was murdered.

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"