This "floating island" plateau sits 7,671 feet above the forest floor.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

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

Catacombs turned marketplace.

London's largest outsider art museum.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

Isaac Newton's former home, where the famous apple tree still stands.

A corkscrew-shaped barn in Ireland.

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

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

A museum marks and documents the site of the Titanic's launch.

Northern Ireland's Brobdingnagian stepping stones.

A curious collection of mechanical moving figures.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

Largest lake in Great Britain measured by surface area.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

Art and a pun, all in one.

An eerie, derelict amusement park in Berlin.

Ruins of a German Castle on top of a towering stone pillar.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.