Green Park (officially The Green Park) is one of the Royal Parks of London. Covering 19 hectares (47 acres), it lies between London's Hyde Park and St. James's Park. Together with Kensington Gardens and the gardens of Buckingham Palace, these parks form an almost unbroken stretch of open land reaching from Whitehall and Victoria station to Kensington and Notting Hill.
By my reckoning, on the extreme left of this image Basher has captured the steps up to number 46, from which address Lord Lucan disappeared 40 years ago today.