A nice cover from Romania, featuring 2 stamps with 2 UNESCO natural sites: Retezat National Park and the Danube Delta.
Retezat National Park is inscribed as an UNESCO Biosphere Reserve since 1979. This biosphere reserve is situated in the southern Carpathian Mountains and has an altitude range from low mountain ranges to alpine landscape. Peak Peleaga with 2,509 meters above sea level is the highest elevation in the biosphere reserve. The Retezat Massif is a well-defined upland block, separated on most sides from the rest of the range by deep valleys and to the north overlooking the Tertiary Hateg basin. The area was glaciated in the quaternary and has many landforms caused by glacial erosion. This biosphere reserve is significant for the conservation of European mountain forest diversity. The vegetation is very diverse due to the varied relief and the junction of three floristic regions in this area.
The Danube Delta is also a Biosphere Reserve (since 1998) and it's the Europe’s largest wetland and reed bed, and functions as its most important water purification system. The delta has wet soils temporarily covered with water, with plants adapted to living in wet conditions. The Danube Delta also includes fixed and mobile sand dune areas home to psamophilic plants. Grassland ecosystems are located on higher parts of riverine bars and on the edges of reef beds, adjacent to coastal bars. The water ecosystems of the reserve are very diverse, including the freshwater ecosystems of watercourses, limans and numerous lakes and bays, and brackish water ecosystems in the delta of the Kiliya Arm.
