This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

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.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Mountain where Jesus was first tempted by the Devil.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

London's marvelous wildfowl reserve along the Thames.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Fighting the British and making game shows for over 150 years.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The atmospheric road was never meant to be so creepy.

The most northerly active sand dunes in the world have some very rare botanical residents.

A sculpture for the sun and stars, created by Nancy Holt.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

The "Prussian Versailles" that is as glorious today as when it was built.

This conical hill was built as a testing ground for an engineer known as the Glider King.

The most visited, and possibly most controversial, museum in Germany.