The Metéora (, "suspended rocks", "suspended in the air" or "in the heavens above") is the name for a number of monasteries in Greece. Several Eastern Orthodox monasteries are part of the complex, located in Kalambaka, Greece. The site is almost as important as Mount Athos. The monasteries are built on natural sandstone rock pillars, at the northwestern edge of the Plain of Thessaly near the Peneios river and Pindus Mountains, in central Greece. The Metéora is home to six monasteries and is included on the UNESCO World Heritage List. Metéora's criteria for the UNESCO World Heritage Site are I, II, IV, V and VII.