Bordered by Mayfair, Bayswater, and Kensington, together the two conjoined are the largest park in the middle of the city. Hyde Park is home to the famous Speakers’ Corner (Tube: Marble Arch, a meandering lake called the Serpentine, and the Diana, Princess of Wales Memorial Fountain (Tube: South Kensington. The most famous promenade is Rotten Row, probably a corruption of “Route de Roi,” or King’s Way, which was laid out by William III as his private road to town; it runs along the southern edge of the park from Hyde Park Corner. Kensington Gardens, which flows seamlessly from Hyde Park, only opened to plebes like us in 1851, and it hasn’t yet shed its country-manor quality. You’ll also find the Serpentine Gallery (west of West Carriage Dr. and north of Alexandra Gate; www.serpentinegallery.org; [tel] 020/7402-6075; Tues–Sun 10am–6pm; free; Tube: South Kensington), a popular venue for its modern art exhibitions and an art bookshop. Each summer, a leading architect creates a fanciful pavilion there. Volunteers sometimes run guided tours of the park’s quirks; check the bulletin boards at each park entrance to see if one’s upcoming. Borrow a Boris Bike and cruise around this giant green playground, and don’t forget to look for Sir George Frampton’s marvelous bronze statue of Peter Pan (1912) near the west shore of the Long Water.