Mentioned by planetware.com
9 Best Parks in London | PlanetWare
"Hyde Park sits between Buckingham Palace and Kensington Palace, adjacent to Kensington Gardens. Hyde Park's most prominent feature is The Serpentine, a 40-acre lake best known for its swimming club, which races here each year on Christmas Day. The park covers a total of 350 acres with numerous walking and cycling trails lined by trees, gardens, and plenty of benches."