The river as fact
It has a length of 215 miles, and is navigable for 191 miles. It is the longest river in England but not in Britain, where the Severn is longer by approximately 5 miles. Nevertheless it must be the shortest river in the world to acquire such a famous history. The Amazon and the Mississippi cover almost 4,000 miles and the Yangtze almost 3,500 miles; but none of them has quite arrested the attention of the world in the manner of the Thames.