Agio Pnevma or the Holy Spirit Rock stands just above the village of Kastraki.The Agios Pnevma Rock is named after a small temple dedicated to the Holy Spirit. Every year during the celebration of the Holy Spirit in June, the residents of the village together with the priest climb a difficult path to the church on the rock to perform the divine service. The church is the oldest in the region of Meteora and perhaps in Greece, dating back to the 10th century. The view from the church is beautiful.