A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

The highest point in Maryland is only accessible by hiking through another state.

America's post-nuclear-attack chambers of Congress.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

Detroit housing collective working to create an "environment for revolutionary change."

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Landmark dedicated to the plight of the American Indian in the 21st century.

The only presidential monument to display a late POTUS's actual casket.

The angel of death appears to weep black tears at this grave marker.

Medical history museum featuring a lovely doctor's office from the 1800s.

Ancient rock-hewn town that witnessed key events of Georgian history.

250-year-old farm now features sculptures, a petting zoo and a hippy-bazaar.

Unique collection containing a wide and curious range of contraceptive items.