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

A remarkably well preserved tower dating all the way back to the Iron Age.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

The ancient tomb acts as a calendar that keeps perfect time.

The largest earthwork effigy in the world.

Native Americans built this circle of stones, which was used to predict astronomical events.

The closest thing to Mars on Earth.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

This grand gothic brewery has been pumping out suds for over a hundred years.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

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

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

A pagan tradition of draping trees with rags eerily lives on.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.