Explore Jamaica's Luminous Lagoon at after dark. The lagoon is natural wonder full of tiny harmless microscopic organisms that give the water it's iridescent blue-green glow. See this fascinating in person on this night cruise. Learn about why the lagoon glows as you cruise to the center of the lagoon, which is less than 5 feet (1.5 meters) deep. As the water gets disturbed, see an eerie light illuminating from below. If you're feeling adventurous, take a swim in the glowing water, one of only a few like it in the world! Don’t worry -- the lagoon’s eerie-looking water is actually completely harmless.