Plitvice Lakes Nation­al Park in Croa­t­ia is the country’s most pop­u­lar tourist des­ti­na­tion. With near­ly 1 mil­lion vis­i­tors every year, Plitvice Falls con­sists of a series of water­falls from 16 dif­fer­ent lakes. And with rough­ly 8 unique trails to choose from, you can take your pick of 3km to 18km routes. If you’re after a chal­lenge, head to the Upper Lakes and Veli­ki Prstavac where you have the option to explore the whole park.