Devil's Throat at Iguazu Falls, on the border between Argentina and Brazil. The Iguazu river is a major tributary of the Parana river.

A herd of rheas in the plains of southern Patagonia, Argentina.

Sunset on the Arabic Ocean at Calangute Beach, Goa, South India, December 31, 1991.

Amazon tidal wave, or pororoca, on the estuary of the Araguari river, Amapa, Brazil, at 8 am, January 22, 1989. The pororoca coincides with new and full moons, and it is strongest during the equinoctial months.

Group of amazon turtles at Goeldi Museum, Belem, Brazil.

The world's largest concrete ford, in the Jaguaribe river at Jaguaribira, Ceara, Brazil.

A group of caimans on the Pantanal of Mato Grosso, near the Transpantaneira Road, south of Cuiaba, Brazil.

Agricultural terraces in the Himalayas, Uttar Pradesh, India.

House on stilts in Caruaru village, near Amapa, Brazil, at the mouth of the Amazon river.

One of more than 200 wooden bridges along the 240-km Transpantaneira Road, Mato Grosso, Brazil.

Mouth of the Amazon river at Macapa, Brazil.

On the banks of the Rio Apa, Mato Grosso do Sul, Brazil.

The Ponce monolith, in the ruins of Tiwanaku, on the Bolivian Altiplano.

Late afternoon in the Pantanal of Mato Grosso, Brazil.

A large rainforest tree, conditioned for survival on the floodplains (varzeas) of the Rio Mamore, department of Beni, Eastern Bolivia.

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