Plitvice Lakes National Park, Croatia

The Plitvice Lakes National Park, Croatia's most popular tourist attraction, was granted UNESCO's world Heritage status in 1979. Located roughly halfway between capital city Zagreb and Zadar on the coast, the lakes are definitely a must-see.

The beauty of the National Park lies in its sixteen lakes, inter-connected by a series of waterfalls, and set in deep woodland populated by deer, bears, wolves, boars and rare bird species.  The National Park covers a total area of 300 square kilometres, whilst the lakes join together over a distance of eight kilometres.

There's also quite an altitude difference - the highest point is at 1,280m, the lowest at 380m - although the total height difference between the lakes themselves is only 135m. (Veliki Slap, the largest waterfall, is 70m tall.)