10 Stunning Hidden Paradises From Around The World

Pamukkale's Travertine Pools: One of the most unique sights in the world is, without a doubt, the cliffside travertine pools in Pamukkale, Turkey. Travertine is a type of limestone that's found in a lot of the world's hot springs. When the spring reaches the surface, the travertine solidifies into stepped structures that hold the spring water. The fairy-tale result usually looks like something out of a Dr. Seuss book—layers of crystal clear pools stacked on top of each other. No matter where they form, they're usually beautiful.Pamukkale was the ancient site of the Greek city of Hierapolis, and the name itself means cotton castle. From a distance, that's absolutely what it looks like. The pools are initially formed from soft calcium carbonate that later solidifies into travertine. Because of the high calcium content, the end result is a hillside that's white as snow.