Mosquito Bay, located on the island of Vieques in Puerto Rico, is renowned for its bioluminescent waters. This natural phenomenon occurs due to the presence of microscopic organisms called dinoflagellates, which emit light when disturbed. The bay is one of the brightest bioluminescent sites in the world, attracting visitors who want to experience its glowing waters. The bay is part of the Vieques National Wildlife Refuge and is accessible by boat or kayak. To preserve its delicate ecosystem, visitors are encouraged to follow guidelines that minimize environmental impact. The best time to visit is during the dark of the moon for optimal visibility of the bioluminescence.