Mosquito Bay
Mosquito Bay is one of the 2 bioluminescent bays located in Vieques, Puerto Rico. It is probably the world's largest and brightest.
If you go swim at night, you'll see the water around you glow in a light blue color.
The luminescence is caused by micro-organisms in water which glow whenever they are disturbed, leaving a trail of neon blue.
If you don't feel like swimming with tiny organisms all over you, there are also tons of wild horses running around the island.
