04-15-2013, 09:12 PM
They're at Alligator Hole, the next river west from Milk River (not Alligator POND).
It's a good 3-4 hours from Negril, maybe closer to 4 because though not as far as Kingston you have to get off the main highway for quite awhile.
It is marked here as "Long Bay", to the east of Gut River and just west of Farquars Beach: http://www.jamaicancaves.org/jamaica-road-map.jpg
There are 3, and they are semi-captive guests of the government. It is possible to hire a rowboat to take you out on the river to see them. We snorkeled with them 10+ years ago but I don't think they allow that anymore.