Best River Thames Tours from Madrid

Running 215 miles long through south England, River Thames source starts in the Cotswolds and then travels through Oxford, Reading, Eton, Windsor, London, Greenwich and Dartford before emptying into The North Sea. "The Royal River," which dates back to the Neolithic period, has 45 locks and more than 25 species of fish. Famous sites on the Thames include The Tower Bridge, London Bridge, The Tower of London, Big Ben, Canary Wharf, Windsor Castle, Eton College and Dartford Crossing.