13. Plitvice Lakes – Croatia

Croatia’s Plitvice Lakes National Park feels like walking through a storybook. A series of 16 interconnected lakes cascade into each other through mesmerizing waterfalls. Each lake dazzles with changing colors, from vibrant green to aquamarine, depending on the minerals and light. While swimming isn't allowed, the scenic boardwalks offer unforgettable views. Take your time to explore – every turn reveals a new, breathtaking angle of this UNESCO World Heritage wonder.