The Monastery of the Holy Trinity in Areti is located next to the village Karydi (close to Neapolis) in a dry and isolated area of Mirabello province. Along with the neighboring Kardamoutsa monastery, they were the most important monasteries of the area (This area has the most monasteries than any other place in Crete). Indeed, it once managed to buy seven other monasteries in the region. Ruined for many years, it was lately restored and is currently inhabited by monks.
From afar, the monastery resembles a fortress, as a part of it is fortified, being one of the five the most important fortified monasteries in Crete. There is a gallery at its entrance, which leads to large vaulted storage rooms, the barn and the main gate of the courtyard. In the main courtyard there are tanks and several buildings. There are cells, kitchen, bakery, metalwork room and other rooms. Outside the closed enclosure there are two large open tanks, an olive oil mill and a creamery, while you will see 12 ancient cypress trees that symbolize the 12 Apostles.