NZ2464 : West Walls north of Morden Tower
taken 15 years ago, near to Newcastle Upon Tyne, England
Built in the C13th century to protect the expanding town from Scottish raiders, Newcastle’s Town Wall was an impressive structure. It was approximately 3km / 2 miles long, up to 2m / 7ft thick and approximately 7.6m / 25ft high. It enclosed the Castle and its Black Gate as well as the main medieval commercial district along the quayside and all the ground northwards to St. Andrews Church. The wall had seven main gateways, 17 towers and 30 turrets. A section of the Wall was extended along the quayside to protect the properties of wealthy merchants from water-borne attack.
Only short sections of the curtain wall now survive as much was demolished in the C19th to aid redevelopment and access. Only five of the original towers have survived.
Wikipedia has a full description and a map Link
Historical Account by Eneas Mackenzie (1827) Link
More images on Geograph can be found with this search Link
National Trails walk around the town walls Link
Tyne and Wear HER(1507): Newcastle town wall Link