The beach at Ipanema is known for its elegant development and its social life. Two mountains called the
Dois Irmãos (Two Brothers) rise at the western end of the beach, which is divided into segments delineated by
postos, or lifeguard towers. Beer is sold everywhere, along with the traditional
cachaça. There are always circles of people playing
football,
volleyball, and
footvolley, a locally invented sport that is a combination of volleyball and football. In the winter, the
surf can reach three metres (nine feet). The water quality varies from clear light-blue water to a more murky green after heavy rains. Constant swells help keep the water clean, and the often treacherous beach break regularly forms surfable barrels. Just west of this colourful section, towards
Leblon, Rio de Janeiro, is another popular stretch of sand known as Posto 10, referring to the #10 lifeguard station. The beach is one of many areas that suffer from the city's poor waste treatment. In its waters, "fecal coliform bacteria sometimes spike at 16 times the Brazilian government's 'satisfactory' level." Large amounts of pollutants are still dumped into the sea through the nearby
marine outfall pipe, a matter of increasing concern to ecologists. Beachgoers often applaud the sunset in the summer. In 2008, the
Travel Channel listed Ipanema Beach as the sexiest beach in the world. ==Posto 9==