Wallabies live naturally on this Irish island.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

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.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

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.

An abandoned socialist utopia built in the late 19th century.

Archaeological site of Iberian people ruins.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

A micro-communist utopia in Spain with no police, no mortgages and full employment.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

A whimsical garden of outsider art in the Spanish countryside.

A display of torture devices used in the Spanish Inquisition and other scourges of medieval Europe.

Giant topiary dog once played a role in a terrorist bomb plot.

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

A contemporary art installation housed within a Gothic cathedral.