The brightest bioluminescence effect in the world can be found on the magical island of Vieques, but don't take our word for it— it was recognized by the Guinness World Record in 2006. Vieques's breathtaking Mosquito Bay has also been designated as one of the 2020s Seven Wonders of the World by Condé Nast Traveller.
Located to the east of Puerto Rico's main island, the small island of Vieques can be reached either by ferry or via a small plane. Once in Vieques, you'd want to arrange a kayak tour of the bay with one of the island's tour providers (some of them even have clear-bottom kayaks!). When planning your visit, it's important to consider the phases of the moon as the glowing effect is better appreciated during nights with a new or crescent moon.