Defensive wall

Defensive walls were used to enclose settlements from prehistory into the modern period. Generally, these are referred to as city walls or town walls, although there were also walls, such as the Great Wall of China and the Atlantic Wall, which extended far beyond the borders of a city and were used to enclose vast regions.

United Kingdom

• Fragments of London Wall, the wall that once surrounded the Roman town of Londinium, are still visible just outside the Museum of London and at Tower Hill.
• The remnants of the city walls of York are both a shortcut above the streets and, as in many places, a tourist attraction.
• The walls of Coventry were demolished in 1662 and now only a few fragments survive.
• Berwick-upon-Tweed
• Canterbury
• Chester
• Chichester
• Conwy
• Londonderry
• Stirling
• Warwick
• Antonine Wall
• Hadrian's Wall