According to the Guinness World Records, the Amazon River in South America is the widest river in the world. The width of the river is around 202 miles where the Amazon opens into the Atlantic Ocean.
In the absence of flooding, the Amazon is about 7 miles wide in the basin section. During the rainy season, the widest basin section of the Amazon River can reach a maximum of 25 miles.
Apart from being the world’s widest river, the Amazon is also one of the world’s longest rivers. Because of the various tributaries that flow into the river, the Amazon River is also the biggest draining basin in the world.