The ancient city of Ypsili in Aprovatou, was discovered in the early 1980s the first excavations brought to light important ancient relics like the temple at the Acropolis center, buildings and part of the wall, as well as many mobile discoveries. The excavation yielded important findings, valuable for the Geometric and Archaic period in the Cyclades and generally in the Aegean.

The sanctuary, the center of the city, probably dedicated to the goddess Demeter, was founded in the 8th century BC and continued to operate at least until the second quarter of the 5th century BC

Ypsili is one of the most important fortified settlements of the early Iron Age in the South Aegean in which newly discovered much of the urban fabric of the archaic phase of the citadel and the fortifications of the Geometric period. Large farmhouses of historical times came to light in the area of ​​Ypsili.