Well, not today, but something I really liked yesterday.
I got an old map from my Dad covering the area where I live.
I already had a facsimile of the area from the official Dutch ministry of war map from 1851,
Now I got an official German map from 1936 covering the same area. 1:100,000
There's old pinholes in it. And they were not made by my dad. He bought it as a used map in a bookshop a bit less than 50 years ago.
The area where I live is still water on both old maps.