Arran UNESCO Global Geopark

UNESCO Global Geopark, inscribed 2025, in United Kingdom. Visit Hutton’s Unconformity, where James Hutton’s 1787 observations showed that the Earth was far older than previously believed—revealed in the striking meeting point between vertical schist and overlying layers of sandstone. Explore the Lochranza slate quarry, home to 540-million-year-old rocks once quarried for roofing, and spot crystals of pyrite—known as ‘fool’s gold’—among the discarded slate. Visit the Isle of Arran Heritage Museum, housed in former croft buildings at Rosaburn, where exhibits trace the island’s cultural and geological heritage from rural life to scientific discovery.