Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

This 1920s Dutch barge is now a floating bookstore.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

A unique waterfall that some believe attracts the fairfolk.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The world's largest collection of witchcraft regalia.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This lonely rock has been turned into a character loved and feared by children.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A replica of the home of a famous fictional troll family.

Despite finally receiving electricity in 1970, this tiny town is now deserted.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

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

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

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A remarkably intact castle that once was the largest in Ireland.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.