Mentioned by planetware.com
19 Top-Rated Tourist Attractions in London | PlanetWare
"Covering 350 acres, Hyde Park is London's largest open space and has been a destination for sightseers since 1635. One of the park's highlights is the Serpentine, an 18th-century man-made lake popular for boating and swimming. Hyde Park is also where you'll find Speakers' Corner, a traditional forum for free speech — and heckling."