Halifet Gazi Tomb is the mausoleum of a 13th-century local governor, built during his lifetime around 1210. Its carved decoration includes rams' heads and Medusa-like faces, an unusual mix that stands out among Amasya's Islamic monuments.
The tomb is in rough condition, so come for the historical oddity rather than polish. It is close enough to the central sights to fold into a walk through town.