Imbros Castle situated on Olemez Mountain in the north of Caunos ancient city was formerly near the port. After its geological structure was changed, the former port had created problems in trade relations and outbreaks of malaria caused by mosquitoes affected the the city's life adversely. Acropolis was constituted by higher hill on east and lower hill on west. The ramparts extending from acropolis to north-eastward are well preserved. They dated back to Mausollus period and were occasionally repaired.