Amazon rainforest

The Amazon rainforest, covering much of northwestern Brazil and extending into Colombia, Peru and other South American countries, is the world's largest tropical rainforest, famed for its biodiversity. It's crisscrossed by thousands of rivers, including the powerful Amazon. River towns, with 19th-century architecture from rubber-boom days, include Brazil's Manaus and Belém and Peru's Iquitos and Puerto Maldonado.