This past weekend, we checked out GC6F8A, Super Duper Underwater Hydro Cache 2.0. Unfortunately it turned out to be a DNF but based on the hint and past posts, we believe that the cache just didn't make it through the past winter (it hadn't been found since last summer).
This got me thinking about underwater caches in general. Has anyone done any in the past or know of any in the state of Maine or NH? I'd love to be able to actually log a find on one.