Thomas Telford is one of Britain's greatest civil engineers, if not the greatest. We discuss this in our blog about him, here. He was extraordinarily prodigious, designing and/or engineering roughly one small bridge a week and one major bridge a year throughout his 50 year career, plus dozens of harbours and canals, thousands of miles of road, and many other public works.
Telford's best known projects are his bridges. It is generally believed that 27 major Telford bridges survive. Cantlop Bridge looks suspiciously un-Telford-like to us, but we give it the benefit of the doubt for now. Your quest is to visit them all. The reward is the title Thomas Telford Devotee. There are intermediate ranks of Fan and Enthusiast for visting 9 and 18 bridges respectively.