The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A 1,000-foot-long railroad tunnel under Shavers Fork connected the towns during West Virginia's logging boom until its closure in 1985.

A 21-foot-tall statue of a miner made of scrap metal stands in this West Virginia coal town.

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

The tallest waterfall in West Virginia.

This former fire tower found new life as a communications hub complete with a scenic overlook.

A beautiful hidden gem in central West Virginia.

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

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

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

A monument marks the location of the first successful steamboat demonstration.

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.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

This general store is more than a century old and home to various oddities and antiques.

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

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

This California artist's front yard acts as a gallery for his unique, scrap metal animal sculptures.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

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

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

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

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.