Rainbow falls is a waterfall in Hilo. It's actually just on the outskirts of the city. Since it's so close to town, as you can imagine, it's a small park. The waterfall is small, but picturesque.
If you go in the morning, the early light is supposed to create a rainbow in the mist of the waterfall. I've actually been here several times, but have yet to see the rainbow effect. If you have any pictures of this, I'd love to see them.
