St Magnus Cathedral in Kirkwall, Orkney Islands, Scotland, is the oldest cathedral in Scotland and the most northerly in the UK. Built in 1137, it's a stunning example of Romanesque architecture with a mix of red and yellow sandstone. Originally dedicated to St Magnus, the cathedral has a rich history involving saints, earls, and even a hidden cavity with bones. Over the years, it underwent extensions and renovations, surviving events like the Protestant Reformation and a siege during a rebellion. Today, it stands as a well-preserved medieval gem, attracting visitors with its impressive spire, Gothic elements, and memorials to notable Orcadians.