The Metéora (Greek: Μετέωρα, pronounced [mɛˈtɛoɾɐ], literally "middle of the sky", "suspended in the air" or "in the heavens above" — etymologically related to meteorology) - is a formation of immense monolithic pillars and huge, hill-like rounded boulders that dominate the local area. It is also associated with one of the largest and most precipitously built complexes of Eastern Orthodox monasteries in Greece, second in importance only to Mount Athos. The six monasteries are built on natural conglomerate pillars, at the northwestern edge of the Plain of Thessaly near the Pineios river and Pindus Mountains, in central Greece. Metéora is included on the UNESCO World Heritage List under criteria I, II, IV, V and VII. The nearest town is Kalambaka. Source .