Bomber
Rincon has Nice's beaches to coinshooting as well as old farm to cache hunting, but 'always' on mind request permission (just verbal) to detect in any farm. I spent many years detecting cache all around the island because in any town has many story about spanish gold coins buried.
In Cabo Rojo at Joyuda over st. #308 and #100 there is (2000) old Spanish farm. Go to Google map for more details.
Good luck
Amona