Silhouette of children playing, walking and running along the mountainside of Pen Y Fan in Brecon Beacons National Park, Wales, Powys, United Kingdom, chased by an adult.  Pen Y Fan is the highest point in the Brecon Beacons hill and mountain range in South Wales. The National Park was established in 1957 due to the spectacular landscape which is rich in natural beauty and is run by the National Trust.  (photo by Andrew Aitchison / In pictures via Getty Images)
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