I think that’s a great idea. There must be lists of locations somewhere – the civil ones anyway. The military ones might be harder to plot – but we could plot the main ones manually.
In the UK for instance, all nuclear weapons are stored in Scotland, just outside Glasgow, the largest city (as far away from London as possible!) at a place called RNAD Coulport (Royal Naval Armament Depot Coulport).
Wikipedia has a huge list of all the civil ones from International Atomic Agency data, but they don’t have coordinates for plotting a map. Google time!
There are some pretty good mapping products/overlays for Google maps that allow categories of locations, searching by location, filtering, etc.
