The tallest waterfall in West Virginia.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

This lookout tower built in the 1930s is now an in-demand cabin with what might be the best view of the Seneca State Forest.

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

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

A historic coal mine that doubles as a museum and tourist attraction.

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

This abandoned train tunnel has been the subject of countless ghost stories for years.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

The world's largest fully steerable radio telescope.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

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

This tiny structure was built by the creator of the Brooklyn Bridge.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

At this site, two historic stone bridges spanning the Sing Sing Kill—one right on top of the other.

This forlorn park is the result of a failed investment turned tax dodge.

This national landmark is also home to a massive treehouse.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

Metal monsters made from repurposed materials lurk alongside this Pennsylvania road.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

A monument to an Irish secret society thought to be responsible for a string of violent attacks in Pennsylvania coal mines.