Lagoa Rodrigo de Freitas, Rio de Janeiro

An unmistakable landmark from the top of Corcovado and a breathtaking view as you leave the tunnel, the lake is largely used by local cariocas as a respite from the hustle and bustle of the city. Visitors to Rio should take advantage of the wonderful water-side walk and 5 mile bike path or maybe the public tennis and volleyball courts, the baseball diamond and soccer grounds. At night, the many kiosks offer good food and live music—some are informal branches of great restaurants.