The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

This charming candle shop has been in business since 1789.

The world's oldest bookshop still in operation.

The symbolic center of Ireland, this summit also offers panoramic views of the countryside.

An important landmark in the history of algebraic logic.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

Fluffy and friendly alpacas nestled against the border of the beautiful Connemara region.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

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

Petrified footprints of one of the very first vertebrates to walk on land.

This ancient Irish landscape boasts hundreds of legendary ruins.

Wallabies live naturally on this Irish island.

Wander among the abandoned ruins of this once-powerful medieval town.

The home of Ireland's last leprechauns is officially protected by the European Union.

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

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.