Hyde Park.  London, UK.

"Every year millions of Londoners and tourists visit Hyde Park, one of the capital's eight Royal Parks.  Hyde Park covers 350 acres and is home to a number of famous landmarks including the Serpentine Lake, Speakers'€™ Corner and the Diana, Princess of Wales Memorial Fountain.  The park also offers various recreational activities including open water swimming, boating, cycling, tennis and horse riding." Source: Hyde Park Official Site.