A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

A memorial honoring those who perished in one of the worst construction disasters in U.S. history.

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

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

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

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

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

This university transit system is a 1970's vision of the future.

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

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

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.

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

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

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

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

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

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

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The "lovely red Vega" of the legendary record-settling pilot.