The heads of two giant mythological water horses honor Scotland's horselord past.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This World War II relic let Allied pilots know they were entering neutral airspace.

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

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

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

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This single room has survived the centuries with almost no deterioration.

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

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

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

Hundreds of personalized inscribed planks make up this historic boardwalk.

This abandoned radar station from the Cold War era now only broadcasts a seriously ominous air of isolation.

These three lighthouses played a fundamental role in the maritime life of Eastham.

The largest glacial erratic boulder on Cape Cod.

This beautiful Cape Cod beach offers dazzling views and an interesting historical footnote.

The Cape Cod house that whaling built.

In a time before lifeguards, this house was a sanctuary for the shipwrecked.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

Mural fragments and various sculptures honor the longtime artist.

This lakeside tower is the third attempt at getting a tourist destination to stick on the spot.

Dedicated to one of the darkest moments in Irish history, this memorial has faced its fair share of backlash.