Mississippi River | River Thames | Amazon River | Columbia River | Hudson River | Colorado River | Potomac River | river | Ohio River | Missouri River | Delaware River | Murray River | River Tyne | Madeira River | Volga River | River Nene | River Clyde | River Trent | River Severn | Amur River | River Wear | Allegheny River | Red River | Dnieper River | Yarra River | Paraná River | River Tees | Fraser River | Yangtze River | Tocantins River |
More recent ones (1500–300 BC) have been discovered in the Turrialba Valley, the coastal region of Gandoca, the northern plains, Sarapiquí Basin, Barva, Herradura, the Térraba River Basin, the Coto Colorado River Basin and Isla del Caño.