These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

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

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Rare recess caves fill this unbelievably beautiful Ohio park.

A castle built by an eccentric medieval enthusiast in rural Ohio.

Take a drunken tour inside the world's largest known geode.

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

The largest earthwork effigy in the world.

Two gems of Beaux Arts architecture that have been sitting vacant for years.

This small West Virginia park is a land trust holdout against mountaintop removal mining.

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

The remains of one of the last mining camps developed on the New River.

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

Home of a 28-foot tall stalagmite known as the War Club.

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

One of the few surviving examples of the first lock and dam system built on the Ohio River.

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.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

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

Take a steam-powered ride straight out of the past on this Appalachian rail line.

A table rock formation that has been intriguing West Virginians for years.