Halki is a very nice village in the middle of an olive grove, in Tragea Valley, with towers built by Byzantines and Venetians. The monuments indicate that Halki was a significant administrative centre, controlling the interior of the island.

You visit the Byzantine church of Panagia Protothroni which was built in the 12th century and the church of Agios Georgios Diasoritis which was built in the 9th century have fine frescoes. Agios Stefanos at Tsikalario, with its 13th and 14th century frescoes is also a place to visit.