Above the village Ano Meros, on Kedros mount, there is the old uninhabited Monastery of Kaloidena with the restored Byzantine temple dedicated to Lord Christ.
Like most monasteries, this too is in a beautiful setting with tall plane trees, lush vegetation, spring water and with spectacular views of Psiloritis Range. The water is said to be one of the coldest around Rethymno prefecture.
The name seems to come from the first owner of the monastery, Kaloidas, as this name was known to Fourfoura during the Venetian period.
The informations are from http://www.cretanbeaches.com/Monasteries/Rethymnon-Monasteries/kaloidena-monastery-ano-meros-fourfouras/
The cache is in of one of the old monastery walls.