An aerial view of the 'Christ the Redeemer' statue on top of Corcovado mountain on July 27, 2011 in Rio de Janeiro, Brazil.
Men play football on Ipanema Beach ahead of the Preliminary Draw of the 2014 FIFA World Cup on July 28, 2011 in Rio de Janeiro, Brazil.
A view of Maracana stadium in Rio de Janeiro on May 15, 2013.
Workers remove seats as they begin the renovation of the Maracana Stadium ahead of the 2014 World Cup in Rio de Janeiro, Brazil, on Aug. 24, 2010.
Locals and tourists enjoy Ipanema Beach in Rio de Janeiro, on July 25, 2012. An unusual 32° C (89.6° F) winter temperature is hitting the city which, according to experts, is due to a warm Amazon mass that prevents the cold front from the south from arriving.
A body surfer rides a wave during high tide in Copacabana beach in Rio de Janeiro on May 22, 2012.
A cable car travels to and from Sugarloaf Mountain in Rio de Janeiro, on Aug. 18, 2008. The cable car leads to one of Rio's most visited sites, with 800,000 tourists per year.
Homes crowd the Rocinha shantytown in Rio de Janeiro, Brazil, on May 22, 2012.
A man walks with his bicycle through the Tijuca Forest in Rio de Janeiro, on July 29, 2012. The National Park of Tijuca is the world's biggest urban forest at 33 square kilometers (12.7 square miles).
A fisherman boy walks amid herons in Mage, deep into the Bay of Guanabara, Rio de Janeiro, Brazil, on July 3, 2012.
Aerial picture taken at the "City of Rock" -- which is to be the site of the future Olympic Village when Rio hosts the 2016 Olympic Games -- on the opening day of the music festival Rock in Rio, in Rio de Janeiro, Brazil, on Sept. 23, 2011.
General view of the Bridge of Knowledge designed by Alexandre Chan at the entrance to the 2016 Olympic city in Rio de Janeiro on March 20, 2012.
Birds overfly the Cagarras Islands, five km away from Ipanema Beach in Rio de Janeiro, Brazil, on May 6, 2010. Several species of marine birds in risk of extinction inhabit the islands making them one of the most interesting spots for tourism in Rio de Janeiro.
A passerby looks at a life-size body sculpture by British artist Antony Gormley, part of the Event Horizon installation, in Candelaria square in Rio de Janeiro's downtown, on August 8, 2012. Gormley's exhibition in the city includes works from Amazonian Field, Critical Mass, Event Horizon and Breathing Room among others.
Artist Jorge Selaron poses while sitting on the staircase he created, the Escadaria Selarón, located between Lapa and Santa Teresa neighborhoods in Rio de Janeiro, on July 27, 2010. Selaron began his project, which is a work in progress, in 1990 with some 2,000 tiles collected from over 60 countries. The Chilean-born artist calls the project a tribute to the Brazilian people.
Cable cars are seen in front of the Penha church after Brazil's President Dilma Rousseff opened the new transportation system in Rio de Janeiro on July 7, 2011. The cable car system in the Alemao slum is part of the effort to crack down on crime and modernize infrastructure as the city prepares to host 2014 World Cup soccer matches and the 2016 Olympic Games.
A "pacified" favela, or squatter settlement, is seen on a forested mountainside in the mist on June 21, 2012 in Rio de Janeiro, Brazil. Rio de Janeiro's authorities have successfully "pacified" a number of formerly crime-ridden favelas in the city although the expansion of favelas due to a housing shortage has contributed to Rio's rainforest destruction. Many are constructed in the mountains and hillsides that surround the city, resulting in deforestation.
Teenagers walk to ride waves at Arpoador Beach on the final day of the Rio + 20 conference on June 22, 2012 in Rio de Janeiro, Brazil.
A man reads a newspaper at the Quinta da Boa Vista park, on May 9, 2013.
Two Urubus fly at sunrise over the "Lagoa" lake of Rio de Janeiro, Brazil on June 29, 2012.
People dance the Jongo, an Afro-Brazilian dance where the samba derives some of its roots from, in Rio de Janeiro, on July 28, 2012. The Jongo ritual is a legacy of African slaves who worked in Brazil's coffee plantations in the 19th century and is celebrated as a tradition mostly in slums and former slaves communities.
Rio de Janeiro's Arcos da Lapa square on March 26, 2011.
A dancer of Mangueira samba school parades during carnival celebrations at the Sambadrome in Rio de Janeiro, Brazil, on Feb. 21, 2012.
Sugarloaf Mountain is silhouetted against the early-morning skies as the sun begins to rise in Rio de Janeiro, Brazil, the host city for the United Nations Conference on Sustainable Development in June 2012. The Earth summit included high-profile talks among some 130 top leaders from nations around the globe.