Telford's Pontcysyllte aqueduct is still in use and still the world's highest. Not bad for a civil engineering project started in the late 18th Century and completed 218 years ago (1805):

https://en.m.wikipedia.org/wiki/Pontcysyllte_Aqueduct

https://m.youtube.com/watch?v=ehX7gKaAL74

Here's another that's somewhat less famous:

https://en.m.wikipedia.org/wiki/Chirk_Aqueduct

Telford was before Brunel (Pontcysyllte was completed a year before Brunel was born) and no doubt the latter took inspiration from him. Both were giants of the Industrial Revolution.