Aerial view of settlement in Amazon rainforest along the Rio Negro, Manaus, Amazonas, Brazil, South America

Aerial view of housing on the Rio Negro, Manaus, Amazonas, Brazil, South America

Aerial view of stilt houses along Rio Negro, Manaus, Amazonas, Brazil, South America

Kasai River flowing through Tshikapa, Kasai, Democratic Republic of Congo, Africa

View of architecture on the Nile river from small boat in Aswan, Aswan, Nubia, Egypt, North Africa, Africa

Aerial of the Dzanga Sangha National Park, UNESCO, Central African Republic

Surroundings of the village of Tighza under a thin layer of snow, Ounila River valley, Ouarzazate Province, region of Draa-Tafilalet, Morocco

Perched hamlet in Ounila River valley between Anmiter and Tighza, Ouarzazate Province, region of Draa-Tafilalet, Morocco

Mekong River bank at Ban Baw, a traditional Lao Loum village between Luang Prabang and Pakbeng, Laos

Aerial of Saray-Juk ancient settlement on the Ural Rver, Atyrau, Kazakhstan, Central Asia, Asia

Kasai River flowing through Tshikapa, Kasai, Democratic Republic of Congo, Africa

Aerial of the Congo River, Mbandaka, Equateur province, Democratic Republic of Congo, Africa

Tshikapa River flowing in the Kasai river in Tshikapa, Kasai, Democratic Republic of Congo, Africa

Saray-Juk ancient settlement on the Ural River, Atyrau, Kazakhstan, Central Asia, Asia

Aerial of Saray-Juk ancient settlement on the Ural Rver, Atyrau, Kazakhstan, Central Asia, Asia

Meander or bend of the Rhine River at Boppard, left, Boppard, Rhein-Hunsrueck-Kreis district, Rhineland-Palatinate, Germany, Europe

Port of Bhamo on the Irrawaddy or Ayeyarwady River, Kachin State, Myanmar (Birma), Southeast Asia

Little Venice on the Regnitz River, Bamberg, Bavaria, Germany, Europe

Woesendorf, cruise ship on the Danube, Wachau valley, Waldviertel region, Lower Austria, Europe