Firth of Tay
The Firth of Tay (Scottish Gaelic: Linne Tatha) is a firth in Scotland between the council areas of Fife, Perth and Kinross, the City of Dundee and Angus, into which Scotland's largest river in terms of flow, the River Tay empties. The firth has a maximum width of at Invergowrie.
Stockton-on-Tees
Downstream on the River Tees is Portrack Marsh Nature Reserve, a nature reserve by the northern bank of the river between the Tees Barrage and the Tees Viaduct near Portrack housing estate. It is the last remaining wetland on the lower Tees. Ownership of the reserve is split between Tees Valley Wildlife Trust and Northumbrian Water, but the reserve is managed by Tees Valley Wildlife Trust. The west and north part of the reserve is mature marsh while there are a series of man – made ponds in the remainder.