When I first visited Orkney I cycled across Hoy to experience the famous sea stack The Old Man of Hoy. As I approached this giant toothy rock created by coastal erosion a helicopter landed on its summit for a brief few seconds and flew off. This to me, along with its ascent by climbers, epitomised the stacks slow, steady decline. Its still a wonder to see and others will replace it.
Old Man of Hoy