Durankulak lake is a coastal lagoon, situated in North-East of Bulagria and separated from the Black Sea by sand dunes and a beach. It is biggest wintering site for the Red-breasted Goose with over 40,000 individuals, 50% of the world population. It is also a winter home for over 30% of the western Palearctic population of White-fronted Goose with over 235,000 individuals. It is situated on the migratory flyway "Via Pontica" and is an important bird area, which what attracts the lovers of nature.