Saint James Park, in Westminster

St James's Park is a 23-hectare park in the City of Westminster, central London. The park lies at the southernmost tip of the St James's area, which was named after a leper hospital dedicated to St James the Less. The park is the most easterly of a near-continuous chain of parks that comprises (moving westward) Green Park, Hyde Park, and Kensington Gardens. The park is bounded by Buckingham Palace to the west, the Mall to the north, Horse Guards to the east, and Birdcage Walk to the south.