At the United Kingdom's only residential library you can sleep among the books.

Mirrored floors and arched shelves create the illusion of an infinite tunnel of books.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

An acoustic anomaly with a mysterious cause.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

A vortex fountain that seems to rise out of the ground.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

A submerged archeological park still holds the wonders of a Roman Sodom.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

A Scottish manor with a history of mysterious fires, magic, and eccentric tales

Thanks to both terrific preservation and historic vandalism this ancient site is known as the "Heart of Neolithic Orkney."

Even after the church tried to wipe the practice out, this pagan festival lives on each year in a small Scottish village.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.