River Thames Thames Estuary), the river is subject to tidal activity from the North Sea. Before the lock was installed, the river was tidal as far as Staines, about upstream. London, capital of Roman Britain, was established on two hills, now known as Cornhill and Ludgate Hill. These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing was built at the site of London Bridge. London Bridge is now used as the basis for published tide tables giving the times of high tide. High tide reaches Putney about 30 minutes later than
Songo River Queen II Songo River Queen II The Songo River Queen II is a diesel-powered stern paddle-wheeler, built as a replica of the steam-powered vessels that traveled the Mississippi River and can hold up to 300 people. The paddlewheeler is known for becoming landlocked in Long Lake (Maine) in September 2011, after a 20-year career on the Songo River, due to the construction of a fixed bridge on Naples Causeway. The "Songo River Queen II", which was christened on Memorial Day weekend of 1982, is the successor to the "Songo River Queen", which burned in a midnight fire on Columbus Day weekend in