Iron foundry
Demirköy Dökümhanesi. Dating back to Byzantine period, and then restored by the Ottomans in 1400s, this is the place which lends the town its name and is where the cannons used in Ottoman siege of Constantinople of 1453 i.e. Fall of Constantinople were cast. One of few examples of medieval industrial heritage in the region, some of brick towers and stone bases of the buildings are still intact, despite being totally abandoned since 19th century. About 3 km out of town.