A park visitor wrapped in a Brazilian flag stands above a naturally forming window known as The Leap from Garimpo and looks out at the Salto do Rio Preto waterfall in Chapada dos Veadeiros National Park in Alto Paraiso, Goias state, Brazil, March 17, 2018. The nature reserve is recognized as one of country's main water cradles, and responsible for the formation of the Amazon basin, with springs that form the Tocantins River. Brazil will host the 8th World Water Forum starting Monday, March 19. (AP Photo/Eraldo Peres)