Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

An overgrown garden stands as a grim marker of an unrealized dream.

This mill on Lake Erie appears to shrink as a viewer approaches thanks to an optical illusion.

A mysterious echo seems to defy the laws of acoustics.

This abandoned factory on the Hudson River once churned out a million bricks a week.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

A huge resale shop for the cast-offs of the film & television industry.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum within a museum, devoted to history's most questionable medical devices.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A toxic ghost town sitting atop a massive coal fire.

An unrealized dream to wirelessly electrify the entire Earth.

This lab's maddening silence is good for business but bad for sanity.