One of my favorite childhood memories growing up in Palau is going to the famous rock islands and climbing up those tiny mushroom shaped islands to get to the Jellyfish Lake. Once you reach the other side of the island, you will discover a marine lake that is land locked. Within the lake, you will find billions of jellyfish that lost their ability to sting because they do not have natural predators. They live off of the sunlight using the photosynthesis process.
