Among the imposing volumes of Pindos and Antiochasia are the sacred rocks of Meteora and the city of Kalambaka. Meteora thanks to its uniqueness is included in the UNESCO World Heritage List. On the tops of sandstone rocks in harmony with the natural landscape 24 monasteries were built during the Christian time. It is an important monument of Orthodoxy the most important monastic state after Mount Athos and has continued tradition for about six centuries. The first monasteries were built with extraordinary craftsmanship in the 14th century. Over the years some of them have been reconstructed until they are in their present form with their own architecture. The ascent earlier was done with scaffolding supported by beams embedded in the rocks with a net and later with ladders. Today visitors use the stairs that were carved on the rocks ensuring a comfortable and safe climb to the monasteries.