While the coastal cities of Dubrovnik and Split draw massive crowds, the real magic of Croatia lies inland at Plitvice Lakes National Park. This pristine wilderness features 16 terraced lakes connected by a series of spectacular waterfalls. The water famously shifts in color from azure to green, depending on the mineral content and the angle of the sun. The best way to experience the park is by arriving early in the morning to beat the tour buses. You can take the panoramic electric boat across Kozjak Lake and then hike the winding wooden boardwalks that hover directly over the cascading water. Don't forget to pack waterproof gear, comfortable hiking shoes, and your camera—every angle offers a postcard-worthy shot.