The Sreburna Nature Reserve is situated 15 km from the town of Silistra.
“Sreburna” was included in the list of the biosphere nature reserves under the aegis of UNESCO in 1977 and in 1983 it was included in the World Register of Natural Heritage. It is situated in Northern Bulgaria, at the delta of the river Danube. It is a lake, 1.5 m deep, fed by water from the river and Karst water. The temperature of the water during winter is 0°C, and in the summer up to 28°C. The natural habitat favours the growth of a wide variety of animal and plant species. Of great interest are the 160 species of birds, 90 of which nest and breed here. “Sreburna” is a stopping place for many migratory birds. It possesses one of the 4 known colonies of the curly-headed pelican in Europe. There is also a considerable colony of herons and other rare water birds. There are many species of mammals, river animals, different plants. The reserve covers an area of 800 hectares. In the vicinity there is a Nature museum and an Ecological research station.