At the heart of the Orkney Islands, an archipelago in northern Scotland, lies an ancient riddle: the Ring of Brodgar. Dating back to sometime between 2500 and 2000 BCE, this Neolithic henge—a type of ancient circular earthwork—and stone circle measure about 104 metres across. Lying on a narrow strip of land between two lochs, the site initially comprised 60 stones, although today only 36 remain. The exact purpose of the structure is still unknown; in 2008, an excavation project called the Ring of Brodgar Excavation was undertaken to try to learn more about the site, but the project has not yet reached any conclusive results. In 1999, the Heart of Neolithic Orkney, which includes the Ring of Brodgar, was recognised as a UNESCO World Heritage Site. If you are planning a trip to Scotland, consider walking amid the echoes of history at the Ring of Brodgar while the crisp Scottish air embraces you.