FOREST RIVERs

The river is so widely spread that it constitutes around 1/5 of the total flowing water on Earth's surface. This river comprises a whopping 1,100 tributaries that flow into the Amazon River, one of the most beautiful rivers in the world.

There are even a couple of surprises: who knew the River Thames is now regarded as the cleanest river in the world to flow through a major city? Read on to see which other waterways make the cut as the world's purest.

There, you will find what The Guinness Book of World Records has called the shortest river in the world. The Roe River measures an average 201 feet in length. It flows parallel to the mighty Missouri River.

The Zambezi is considered by many to be the world's most dangerous river, which is partly what drew me. It's almost 3,000km long, peppered with unexploded mines, killer rapids and deadly animals. Before the expedition, I joined a wildlife survey that counted 188,000 crocodiles and 90,000 hippos along its length

Saudi Arabia is the largest country that doesn't have a river. The Vatican is the smallest city-state on earth and has no forest river inc forest river campers