There is a Sunken Ferry (sank in 1970`s) between St. Kitts and Nevis that you can penetrate. It is sitting upright and has not sunk into the ocean floor very much. You can swim into the cabins and witness piles of human bones. Apparently, rescue attempts were near impossible at the time of the disaster because sharks came from hundreds of miles to feed; divers had to be lowered in cages to survey the wreck(according to our dive master).