Prioksko-Terrasny Nature Biosphere Reserve is one of Russia's smallest zapovedniks, sprawling over an area of 5,000 hectares along the left bank of the Oka River in the Serpukhov District of Moskva Oblast.
Prioksko-Terrasny Nature Biosphere Reserve is one of Russia's smallest zapovedniks, sprawling over an area of 5,000 hectares along the left bank of the Oka River in the Serpukhov District of Moskva Oblast.