The ruins of a medieval monastery named after a type of tree.

This European portal tomb has a capstone that weighs around 150 tons.

A stunning Victorian abbey and walled garden on a lakefront.

This natural sea arch highlights Ireland's rugged coastal beauty.

A hugely vast Irish landscape of barren rock that stretches for miles.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Obelisks and stone pineapples in the Irish countryside.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

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

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

A man throwing a giant severed hand towers over Antwerp’s main square.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This futuristic German television spire is actually the world's largest digital clock.

Twisted buildings adorn the banks of the Rhine river.