Postcard DE-2356456 from Germany arrived yesterday shows the national park Lakes of Plitvice located in the karst mountain range of Croatia. The park is famous for its lakes arranged in cascades. Currently, its 16 lakes result from the confluence of small surface rivers and
subterranean karst rivers. The lakes are all interconnected yet separated by natural dams of travertine from moss, algae, and bacteria deposition and growth. Plitvice Lakes National Park was declared a UNESCO World Heritage Site in 1979 among the first registered natural sites worldwide.