The Kamchia Biosphere Reserve The Kamchia Biosphere Reserve, (Bulgarian: Биосферен Резерват Камчия) is a UNESCO-listed biosphere reserve on the northern coastline of Bulgaria, comprising the floodplain at the mouth of the Kamchia River. Consisting largely of alluvial longose groves, (or the Longoz as its also known), but also featuring some of the Black Sea coastline,...