The sacred shrine of the Yazidis.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Where the sleeping monsters of Scotland's oil industry are left to rust.

A beautiful but toxic fountain of mercury.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

Four steel monoliths stand in the Qatari desert, in a breathtaking work of large-scale art by Richard Serra.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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

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

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

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

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The ancient tomb acts as a calendar that keeps perfect time.

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

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

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

This picturesque castle in Poland has a rich history, including a legend that ties it to lost Incan treasures.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

A 2200 year old vessel may have been able to keep a charge.

A 605-page Quran penned in the blood of a dictator is locked away in a mosque.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.