This designer village lies north of Welwyn Garden City and benefits from fast rail links into London via Welwyn North station. Digswell viaduct is an unlikely gem that is something of a tourist pull. The important local landmark and grade II listed structure carries the East Coast Main Line over the River Mimram and is situated between Digswell and Welwyn Garden City. It took two years to build, involved moving a whopping one million tons of earth by human and horse power and was opened by Queen Victoria on August 6, 1850 – but in an historic PR blunder, she was petrified of the height and refused to go on it!