Slide 12 of 31: This national park, located between Zagreb and Zadar, is all about blue and green, with a chain of 16 lakes scattered across a lush, wooded landscape and interconnected by a series of wondrous waterfalls. They trickle between forest and in rivulets carved in limestone, pouring into turquoise pools. They’re not the tallest – the longest drop is 255 feet (77m) – but the sheer number of them, and the beauty of their surroundings, makes for a jaw-dropping sight.