Agia, Rock formation in Kalabaka, Greece

Agia is a rock in the Meteora formation of Thessaly, Greece, overlooking the town of Kalabaka. Its peak reaches 630 m above sea level. The main rock is called Megali Agia (Large Aya), while its lower part is known as Mikri Agia (Small Aya).

Monks built a monastery on this rock in the early 16th century, with written records confirming its existence by 1551. The establishment demonstrates how religious communities sought out isolated rock peaks as protected locations.

The ruined Monastery of the Holy Apostles on Agia is also called Aïá, a name that echoes the rock itself. Visitors can still find wall paintings, carved stairs and a cistern among the remains, which were documented by 1551.

Agia rises directly above Kalabaka, so the rock is reached on foot from the town rather than by road. The ruins of the Monastery of the Holy Apostles sit on the summit at 630 m above sea level, and the climb follows carved stairs cut into the rock. A cistern on the rock once supplied the monastery with water.

The rock's name is often confused with the Monastery of the Holy Apostles on its summit, which was documented in 1551 and possibly founded by the monk Kallistos. Visitors can still see the monastery's murals, carved stairs and a cistern among the ruins.