I have the best of luck today doing T-map. All those location can't be access And the best of all. was the one on Buccaneer's Den, the chest was on the river by the bridge. I was able to open the chest by can loot anything. Waste a Pardon and not sure what else. I'm sure I read somewhere that all the map will be reset to valid location. Hopefully this is the last time I find don't map. Still have a full chest of map to decode, let see what kind of surprise UO have to offer.