About 7km inland from the town stands Ünye Castle, a ruined fortress founded by the Pontics and rebuilt by the Byzantines, with an ancient tomb cut into the rock face below. Catch a minibus (₺2) heading to Kaleköy or Akkuş on the D850 road to Niksar and Tokat, and ask to be dropped off at the road to the castle. It's a further 2km trek to the top. A taxi will cost ₺30 (or ₺40 for waiting and return).
