Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Darien National Park' has mentioned 'Biosphere reserve' in the following places:
Occurrence Sentence Text Source
In 1983 an area of 859,333xc2xa0ha (8,593.33xc2xa0km2) became a UNESCO biosphere reserve.
World Heritage status since 1981 and international designation as a biosphere reserve by UNESCO and parts of the area by the Ramsar Convention add a layer of recognition and protection.