Have you ever had the joy of visiting the Salt Castle in Austria? Not far from Salzburg are many old underground mines used to extract salt from ancient seabed deposits. One is open to tourists with its ancient wooden slide used by miners to descend to work, its mirror-like salt sea, its salt cathedral, and its bronze brine pump in continuous use for over a hundred years.
Thanks, David. This was interesting and an excellent life challenge.
(Not convinced that we should try salt on our stressed lawn this summer, though.)