10km/7mi to the west of the regional center of Erbaa (pop. 29,000), close to the border of the neighboring Amasya province and about 70km/43mi north of Tokat lies the tiny village of Akça and its mosque (Silahter ämer Pasa Camii). The interior of this 18th century mosque has been beautifully painted. Some 15km/9mi northwest of the town near the
village of Kale, the remains of a castle with some interesting underground passages can be found. The site was formerly known as Magnopolis (Eupatoria).
The Pontic fortress of Kainokhorion (also Mahalic Kalesi) lies some 35km/22mi north of Erbaa near the village of Ahretköy but it can only reached along some poor roads. It was here that Mithradetes VI Eupator sought protection in 70 B.C. The most interesting sight in the Erbaa region is without doubt Horoztepe, a short distance to the south. Valuable finds from the Hittite era have been unearthed here including cult rattles, banners and mother figures. These are now displayed in an Ankara Museum.