The Kastriani Monastery, located on the picturesque island of Tzia, is a place of tranquility and spiritual significance. Perched on a hilltop overlooking the Aegean Sea, this monastery has a rich history dating back to the 18th century.

The whitewashed walls and blue domes of the buildings create a striking contrast against the backdrop of the azure sea and the lush greenery of the island.

The main church, dedicated to the Annunciation of the Virgin Mary, is adorned with beautiful frescoes and icons that depict scenes from the Bible.