Barnard Castle is a market town on the north bank of the River Tees, in County Durham, England. The town is named after and built around a medieval castle ruin. The town's Bowes Museum's has an 18th-century Silver Swan automaton exhibit and paintings by Goya and El Greco.

The River Tees, in England, rises on the eastern slope of Cross Fell in the North Pennines and flows eastwards for 85 miles (137 km) to reach the North Sea in the North East of England. The modern day history of the river has been tied with the industries on Teesside in its lower reaches, where it has provided the means of import and export of goods to and from the North East England. The need for water further downstream also meant that reservoirs were built in the extreme upper reaches, such as Cow Green.