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.
Afon Dyfrdwy (River Dee)
Afon Dyfrdwy (River Dee) is a Site of Special Scientific Interest in the preserved county of Clwyd, north Wales. The river begins in Parc Cenedlaethol Eryri, in Snowdonia, Wales. From there, it flows northeast to Corwen, goes eastward past Llangollen, and continues east through Chester, England. It empties into Aber Dyfrdwy, an estuary that forms the border between the Wirral Peninsula in north-west England and Flintshire in north-east Wales. The river has been designated a Designated Special Area of Conservation due to its role as a habitat for Atlantic Salmon and Floating Water Plantain.