These stark white cliffs were spat up by the sea and are slowly being retaken by it.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

England's most notorious suicide spot.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

Rebuilt remains of a temple to Roman god Mithras.

One part local history, 99 parts gruesome haunted house.

An unusual round church in London with a Templar past.

Modern sundial uses ancient methods to tell time and date perfectly.

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

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

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

The largest portal tomb in Europe has a capstone weighing around 150 tons.

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

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

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

You may get stranded and everyone's peeing in the water, but at least there's cocktails!

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

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

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

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

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