At first glance, the image above may look like a scene from Avatar, complete with an underwater waterfall, but it's actually just one of the coolest aquariums ever. That's right, the "floating islands are composed of polystyrene domes with the plants mounted on top. The islands are then suspended in the tank with fishing line, to keep them from floating all the way to the top." Continue reading for a video and more information.
Now about that underwater waterfall. It looks like the real deal, but it's underwater, so it can't actually be a waterfall, right?
What you're actually seeing fall is fine white sand. If you look closely, there's a bit of it piled up at the bottom of the "waterfall."