Croatia is a republic located in southeastern Europe along the Adriatic Sea. The old port cities of Dubrovnik, with its solid medieval walls and orange roofs, and Split, built around an ancient Roman palace, are popular among tourists. The area is also attractive for its natural beauty, full of magnificent scenery, such as the Plitvice Lakes National Park with its beautiful blue lakes and countless waterfalls, and the Krka National Park, where visitors can enjoy the clear rivers and greenery.