Royal Observatory at sunset, UNESCO World Heritage Site, Greenwich, London, England, United Kingdom, Europe

royal observatory greenwich london sunset unesco prime meridian evening landscape travel scenery tourists exploration atmosphere iconic landmark outdoor relaxation sunshine urban city life nature people summer beauty historical site hills views cultural heritage sun beams enjoyment global destination sightseeing peaceful warmth evening light high angle iconic green spaces heritage site travel destinations visitors scenic spot southern sky historical significance iconic structures cultural tourism inviting cityscape charming sunflare gardens