The paper aims at highlighting the new attitude of the Danube riparian states, expressed by the signing of the Convention adopted in Sofia on June 29, 1994. For the first time, the riparian states have shown interest other than that related to the navigation regime, taxes and tariffs, respectively protection and sustainable use of the Danube. In this context, Romania has been preoccupied and it is still preoccupied with ensuring the protection of the environment in the Danubian basin on our territory. In accordance with European and international regulations, natural areas protected by a different regime of protection, conservation and use according to national, international, community, county or local interest categories have been established by internal normative acts in accordance with European and international regulations. They consist of scientific reserves, national parks, nature monuments, nature reserves, natural parks, biosphere reserves, etc. Of these, we have selected the Danube Delta Biosphere Reserve, the Balta Mica a Brailei Natural Park and the Iron Gates Natural Park.