The Acropolis of Onithe, a Hellenistic-era fortress potentially dating back to 1400 BC, occupies a strategic position on the Onithe plateau at 638 meters elevation. The site features a pseudo-isodomic wall enclosing a right-angled area with 12-meter sides and remnants of a defensive tower. A steep, natural cliff forms the southern boundary of the acropolis. The site's location provided control over key passages and access to the settlement, underscoring its strategic significance in ancient Crete. Pottery finds suggest the possibility of earlier settlement phases dating back to the Proto-Minoan and Late Minoan periods. The acropolis, referred to locally as 'Ntapia,' meaning fortification, likely played a role in Cretan revolts in 1821, 1878, and 1897.