This English river flows from the Cotswold  hills to its mouth on the North Sea
The river's 
source is at the Cotswolds Hill in Thameshead, and it empties into the ... One of 
the famous landmarks in the English capital, the London Bridge ... A: The longest 
river in Italy is the Po River, which flows over 405 miles from its source in the Val
... [DOC] [TLE] Print - Grolier [PAR] When a river reaches a lake or the sea, its flow slows down suddenly.