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

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

An ancient neolithic tomb that only sees the sun twice a year.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

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

Historic medieval fortified city in southwest France.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

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

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

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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

The modern birthplace of Irish freedom.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Northern Ireland's Brobdingnagian stepping stones.