A clever example of water management is being done in the Kinderdijk mill complex. The 19 mills were once built to pump water up from the low-lying polder. The complex is on the UNESCO World Heritage List.
Haastrecht is a city in South Holland with a striking lift bridge from 1883 over the Hollandse IJssel and some beautiful buildings such as the town hall and the St Barnabas church. For more info see: https: //en.wikipedia.org/wiki/Haastrecht