The petrified forest of Lesbos is the largest of two major petrified forests in the world (the other being Arizona's Petrified Forest National Park). It is located on Lesbos in Greece. It has been designated as a protected natural monument. The petrified forest of Lesbos was formed from the fossilized remains of plants, which can been found in many localities on the western part of Lesvos Island. The area enclosed by the villages of Eressos, Antissa and Sigri is very dense in fossilized tree trunks and forms the Petrified Forest of Lesvos. Isolated plant fossils can been found in many other parts of the island, including the villages of Molyvos, Polichnitos, Plomari and Akrasi. From Wikipedia.