Transcript for Exploring Palau's Mysterious Jellyfish Lake
Finally tonight, summer is near and you may see cool fish when you hop in the water but I pretty much guarantee they won't come close to what ABC's ginger zee found on this journey to the other side of the planet. Reporter: Majestic, magical, mysterious. A swirling color palate of blue waters teaming with the magnificence of marine life. Welcome to Palau. A string of islands in the north pacific ocean southeast of the Philippines. This tiny island nation is an underwater utopia with the world's first shark sanctuary. Giant clams and my friend here, a 400-pound Napoleon ras Palau is home to a fluke of nature called jellyfish lake and I'm about to find out why. Now we are going to hike 20 minutes to jellyfish lake. Reporter: Our hike will take us to the other side of these tree tops. Welcome to jellyfish trail. Definitely humid. You can feel it everything we need, cameras, gear, my crew and local guide carrying through the woods. Not some he carrying my gear but no shoes. My working shoes. Few more steps and there it is. We're getting in to it now. As we swim out, I spot a few. And then, boom, jellyfish nation. Oh, my god! There are so many. But get this, the miraculous thing about these jellyfish -- they don't sting. Reporter: Like floating through a living lava lamp, swirling globes of golden marshmallow puffs. Oh, my god, so cool. This is unbelievable. It really is. So special. ? Reporter: But the truth is whether you come to Palau to snorkel at this sunken ship/barrier reef, scuba dive with sharks and napoleons or swim with the jellyfish, just being in this place, witnessing the wonder of nature will make you feel like kid again. Beautiful sunset. So long, Palau and thank you. Another ginger zee extravaganza. Our thanks to ginger tonight. Memorial day is around the corner. Where are you dying to get away to? Tell us about your dream vacation.
This transcript has been automatically generated and may not be 100% accurate.