Puerto Rico has bioluminescent bays, where a kayak trip on a moon-less night reveals glowing water when you paddle. There are only five of these rare ecosystems in the world, and the island is home to three of them! The mesmerizing brightness of the bays is due to the amount of microscopic, single-celled organisms called dinoflagellates that light up when the water is agitated.
Excerpted from Discover Puerto Rico. Read more here!
Image credit: Edgar Torres