text:  Papa <unk> is one of the Shetland Islands in Scotland , with a population of under twenty people , some of whom immigrated after an appeal for residents in the 1970s . Located to the west of mainland Shetland and with an area of <unk> hectares ( 3 @.@ 2 square miles ) , Papa <unk> is the eighth largest island in Shetland . <unk> of the soft volcanic rocks by the sea has created an extraordinary variety of caves , <unk> , arches , <unk> , and cliffs . The island and its surrounding seas harbour diverse populations of wildlife . The west side of the island is a Site of Special Scientific Interest and the seas around the island are a Special Area of Conservation . 
  