I used to be an avid diver, and I worked at a dive shop on Table Rock Lake in Branson, MO during the early 90s. At that time, whenever I drove somewhere, I imagined what the place would look like underwater. These days when I drive someplace, I imagine where the best spot to hide a cache would be. :)
We have a neat dive location in our area called Martha's Quarry. I'll have to see if I can get the Diving Bug headed in that direction...