The four Bourgas lakes (Pomorie, Atanasovsko, Vaya and Mandra) are known for their exceptional biological variety and the biggest and most esteemed of wetlands in Bulgaria.

Just outside Kraimorie is situated Poda Lagoon protected area - the easternmost part of Mandra Lake. This is one of the few places in Europe, where on such small territory 231 plant species, 168 invertebrate species, 6 fish species, 14 amphibian and reptile species, 259 bird species and 15 mammal species can be found.

The area is situated on the main east European migration route, Via Ponticum. During autumn migration up to 300 000 White Storks and about 30 types of daily rapacious birds are passing. In the winter months many worldwide threatened species can be observed.