River Thames shipping coming in and out of London, in 1732 it received the world's first lightship. This became a major landmark, and was used as an assembly point for shipping. Today it is marked by Sea Reach No. 1 Buoy. The River Thames contains over 80 islands ranging from the large estuarial marshlands of the Isle of Sheppey and Canvey Island to small tree-covered islets like Rose Isle in Oxfordshire and Headpile Eyot in Berkshire. They are found all the way from the Isle of Sheppey in Kent to Fiddler's Island in Oxfordshire. Some of the largest inland islands, for example
Exe Estuary Exe Estuary The Exe estuary is an estuary on the south coast of Devon, England. The estuary starts just to the south () of the city of Exeter, and extends south for approximately eight miles to meet the English Channel (). The estuary is a ria and so is larger than would be the case given the size of the River Exe, the main river feeding into the estuary. On the east shore (from north to south) are the town of Topsham, the villages of Exton and Lympstone and at the estuary mouth, the seaside resort of Exmouth. Opposite Exmouth