Stora Karlsö is a small Swedish island in the Baltic Sea, situated about 6 km (3.7 mi) west of the island of Gotland and part of Eksta socken. Environment. Stora Karlsö has an area of about 2.5 km2 (0.97 sq mi). It is mainly a limestone plateau, up to 52 m (171 ft) in height, bordered by steep cliffs along the shore. It is mostly covered with alvar. It is a nature reserve, the second oldest in the world after Yellowstone National Park. Flora and fauna. The island is mostly known for its rich flora and birdlife. There are many juniper bushes and some small groves of deciduous trees.
https://en.wikipedia.org/wiki/Stora_Karls%C3%B6