5. Krka National Park, Croatia
Dalmatia’s (Croatia) Krka National Park boasts one of the most serene waterfalls you could ever hope to encounter. Numerous falls cascade into pools of green-blue water. Although Croatia is home to numerous beautiful scenic delights, the Krka National Park is one of the best. You can swim in the lakes (though, you are not allowed to swim under the waterfalls themselves) and lie in the sun, or you can spend a day exploring the trails.