Isambard Kingdom Brunel
From Wye Waltz Wiki
Although Chepstow's railway was built to Brunel's (Huzzah!) famous Broad Gauge, Brunel himself had little to do with the local railways. His greatest local contribution was the Chepstow Railway Bridge, a typically brilliant and innovative structure on a difficult site. Only the piers remain today, but it's still an interesting riverside walk to visit.
For most of Brunel's works today, it's best to visit the nearby Bristol. Here the famous Clifton Suspension Bridge and SS Great Britain may be seen, but also many less well-known works such as the Underfall Yard and his very first iron bridge across Bristol docks.