They feel like part of a potlach economy. All that steel and concrete must have driven a steel-and-concrete economy quite well. That they had no good economic property once made, is less attractive but thats innate in potlach: you spend capital to destroy it, to force things to happen, not to build capital intensity in the things bought.<p>I bet more than a few of these were longterm pigsties. Not the ones on the beach maybe.<p>The bunkers which litter northern France are far sadder I think. These ones were sort-of self imposed stupidity, but the organization Todt carries a burden which is still being lived.