OK, this is cool. Wow. We cruised around the island, and ended up on the far side near hot `springs.' The idea was to jump into the water and swim toward the island, into the little channel. I had a fabulous, 2nd-story jump in from the Albatross, and swam upriver as the water got hotter and hotter. They're hot `springs,' but they are out in the ocean. The red is a mix of iron and mud.