On the way to Empourios, just before getting to Fatourena beach, you will reach the monastery of Agia Marina.
This monastery was in operation from around 1650 to 1830 and is one of the 13 monasteries the French traveler Tournieyef visited while it was still in operation and which he mentions with admiration in his travel accounts. (Tournieyef visited Milos in 1700).