The cloud forests in Costa Rica are very strange. At first it was hard to make out details; it looked like a solid mass of greenery, but as I got used to it, I saw that there was a lot going on, it's just that everything around me had similar coloring.
I also went to a bioluminescent bay on Vieques, a small island off of Puerto Rico. It's ringed by mangroves and there are clouds of mosquitoes. At night, if you paddle out the dinoflagellates react and each stroke results in these glowing blue swirls. You can also see light trails from the fish as they flash by. If you swim in it, it's a bit like making snow angels or wearing an intangible robe made of fireflies.