The Metéora (Greek: Μετέωρα, "suspended rocks", "suspended in the air" or "in the heavens above") is one of the largest and most important complex of monasteries in Greece, second only to Mount Athos.^[1] 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 ^[2] for the UNESCO World Heritage Site is I, II, IV, V and VII.

http://en.wikipedia.org/wiki/Meteora

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