Joseph Monier in France invented a method for reinforcing concrete garden plant pots with steel, and later used the idea to produce concrete pots and other structures. A nearby factory was set up by the Monier company producing concrete roof tiles.
Parking is available nearby, but you may have a short walk to the cache.
Please make the effort to replace the cache where you found it. Don't leave it lying loose around the place like it seems to have been in the past.