Stalactites and stalagmites in a beautifully lit cave.

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

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

This abandoned amusement park was built on a site with a dark history.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

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

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

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

The world's largest fully steerable radio telescope.

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

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

This Cheshire museum has cuckoo clocks, a rare pipe organ and vintage motorbikes. But mostly cuckoo clocks.

A giant wooden soda bottle pays homage to a distinctly British drink on the very spot where it was invented.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

This Manchester laundromat is hiding something.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

British Empire's last territorial expansion, claimed by four countries.

The abandoned village of Skarð aptly illustrates the idiom "Don't put all your eggs in one basket."

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

This natural rock formation features seemingly unnatural vertical ridges that have been blamed on elves.

A giant concrete orb in far north Iceland marks the ever-shifting boundary.