River Tay
The River Tay emerges from Loch Tay at Kenmore, and flows from there to Perth which, in historical times, was its lowest bridging point. Below Perth the river becomes tidal and enters the Firth of Tay. The largest city on the river, Dundee, lies on the north bank of the Firth. On reaching the North Sea, the River Tay has flowed from west to east across central Scotland.
Helford River
The area falls into a Special Area of Conservation (Fal and Helford), Site of Special Scientific Interest (Lower Fal & Helford Intertidal) and the Cornwall Area of Outstanding Natural Beauty. The growth of eco and sustainable tourism have seen the development of tourism by Helford River Expeditions focusing on the natural surroundings. The National Trust play an important role with their strategy. Natural England (formerly English Nature) contributes by protecting and monitoring the area. The river is unique in that it is not wholly managed by a specific port or river authority, but brings together major environmental groups and organisations interested in the protection and development of the river. These introduce and recommend safeguards, such as those put forward by Helford River Marine Conservation Group.