Saint James's Park is one of the oldest parks in the City of Westminster in London. It is 23 hectares (o,23 km²) large and is surrounded by buildings including two palaces: Buckingham Palace, Green Park, Queen's Gardens, the Victoria Memorial, Horse Guards, Birdcage Walk. It opens every day and welcomes more than 5 million visitors per year. In the park there is a small lake called Saint James's Park Lake with two islands: West Island and Duck Island (a duck reserve).