1. Bioluminescent Bay, Puerto Rico
One of three bio-luminescent bays in Puerto Rico, there's a reason this bio-bay is first on our list: It looks absolutely out of this world! Visitors can book a kayaking tour to experience the famously enchanting glowing waters. The natural bio-luminescence is caused by flagellates, or tiny micro-organisms, undergoing photosynthesis in the water.

Found here.