One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Home to the "Circus" trees created by Axel Erlandson.

The ruins of this medieval castle on a foggy hill tell the story of a once-mighty empire.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

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

This series of Scottish caves has no clear purpose other than baffling historians.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The sign at the garden gate reads: "These Plants Can Kill."

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

A 13th-century inn where the ill-fated King Charles I spent his last night of freedom.

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

The undercroft is a spectacular example of medieval Cistercian architecture.

You can crawl inside this atmospheric 5,000-year-old tomb.

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

Picturesque ruins once held off mighty armies.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

It's possible to walk inside one of the largest Neolithic tombs in Britain.

Putting the "mod" in "modular" since 2000.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.