Located near the town of Falmouth along the vast marshlands of Trelawny, Luminous Lagoon used to play an important role during the heyday of Jamaica's sugar trade. Located at the point where the Martha Brae River spills into the Caribbean Sea, the lagoon had a big wharf where large British vessels once docked. As the sugar trade declined, the lagoon became a popular tourist destination for one unique feature: It is one of the best places in the country to observe bioluminescence - a light produced here by tiny organisms called dinoflagellates that glow in the dark in the shallow warm waters of the lagoon. On a dark night, millions of these little animals light everything they touch, from fish to plants and the occasional swimmer - tour guides bring their visitors to the quiet waters at night and let them swim surrounded by the magical light. Luminous Lagoon is considered one of the largest and most outstanding places for visitors to observe this brilliant spectacle.