Meteora is a complex of enormous sandstone rocks rising above Kalambaka. On top of some of the rocks magnificent monasteries are built. They are the second most important monastery complex in Greece, next to Agion Oros (Mount Athos). Unfortunately, nowadays only seven of the out of thirty original monasteries are still active. During our tour we can visit two or three of them depending on the day of the visit. Since 1988, those monasteries have been included in the UNESCO list of World Heritage Monuments.