Fishermen in the Danube Delta Romania, with their catch in a small boat With more than 5000km2 the danube delta is the largest wetlands in europe most parts of the danube delta are part of the biosphere reserve, national park, ramsar site und unesco world. Fishermen in the Danube Delta Romania, with their catch in a small boat With more than 5000km2 the danube delta is the largest wetlands in europe most parts of the danube delta are part of the biosphere reserve, national park, ramsar site und