The Trig Point, a concrete ring, at the highest point, Hallsfell spur, of Blencathra Mountain, Lake Districts, Cumbria, UK. Trig Points are the common name for Triangulation Pillars are used by Ordnance Survey to determine the exact shape of the country by creating direct line of sight to another Trig Point. The beautiful hills and valleys of the Lake District National Park surrounds the mountain. The sky is cloudy and overcast. (photo by Andrew Aitchison / In pictures via Getty Images)
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