I just watched this video from Real Engineering:
https://www.youtube.com/watch?v=52VQdt0-5EQSummary: 19 lost bombers planes and 53 downed pilots using a revolutionary bomb hit 2 of the 3 dams in Germany during World War 2 causing significant
indirect harm to the Axis' war effort.
The dams were rebuilt quickly and expertly in only 5 months, but at a cost of significant redirection of resources due to the immense importance of the hydroelectric power offered by the dams (costs far above the lost planes and experienced RAF pilots).
I am wondering if any targets of this nature might be available at some time ~in the future~ and what those targets might look like.