Spiral alpine structure provides an alternative experience of viewing the Matterhorn.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A magically clear, blue river that seems to spring from nowhere.

This pebble beach is so beautiful that taking its rocks is against the law.

Less a museum than a bizarre fantasy world created by artists and engineers.

A heavenly experience, right here on Terra Firma.

Abandoned railway line circling the city of Paris.

Houses are tucked between, on, and underneath giant boulders.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

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

Large Hadron Collider and the Birthplace of World Wide Web.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Three columns of volcanic rock shoot out of the ocean.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

These spooky and unusual stone formations create an underworldly landscape.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

A historic observatory precariously perched at the "Top of Europe."

Caves famous for the dragon-slaying saint who lived there.

A visionary precursor to the Internet made of index cards.

The oldest public library in Ireland.

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.

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