From London to Edinburgh and over the Irish Sea to Belfast and Killarney this adventure across Ireland and Great Britain pairs iconic sights with once in a lifetime experiences. Join the Yeoman Warder at the Tower of London and bear witness to the Ceremony of the Keys, the oldest practiced military tradition in the world. In Northern Ireland, join a local ranger to explore the spectacular Giant��s Causeway and in England, journey to the majestic 11th-century Alnwick Castle—known to many from the Harry Potter films.