Not far from Negril but closer to Montego bay there is a bioluminescent lagoon with microorganism that glow at night when you swim in the water. You can have dinner there before taking the boat ride and you get a discount for the boat. Make sure you are the first in line to leave the boat for swimming so you have more time to enjoy in the water. There are only five places in the world with this bioluminescence: one in Puerto Rico, one in Vieques, one in Jamaica, one in Indonesia, and Phi Phi Don,Thailand.