Complex sentence: In the Danube Delta and in the South, in the area between the Sfântu Gheorghe Channel and the Razelm Lake there are countless channels and small lakes the entire area being included in the UNESCO list of World Heritage Sites and Biosphere reserves.
Split into simpler sentences: In the Danube Delta and in the South--in the area between the Sfântu Gheorghe Channel and Razelm Lake--there are countless channels and small lakes. The entire area is included in the UNESCO list of World Heritage Sites and Biosphere reserves.