Ohi, Mountain summit in Euboea, Greece.

Ohi is a mountain summit in the southeastern part of Euboea island, Greece, rising to around 1,400 meters with steep slopes and rocky terrain. Several hiking trails lead to the top, and a mountain refuge along the main route offers shelter and water to those making the ascent.

Ochi is the Latin Oche mons of ancient Greek geography, and its slopes bear the megalithic drakospita, dry-stone structures of unknown builders, the best known on the summit. The mountain's modern record is sparse; the sources document no wartime use of the summit.

The summit is named Prophet Elias after the chapel built there, one of many Greek peaks bearing that name. The mountain's own name, Ochi, survives in the Latin form Oche mons. The megalithic dry-stone structures called drakospita, "dragon houses", take their name from local lore that dragons, not people, raised them; the best known stands on the summit itself, others at Styra and Nimporio.

Trails begin from different points at the base of the mountain and vary in length and difficulty, so it is worth checking which route fits your level before starting out. Solid footwear and water are important to bring, as the terrain is rocky and conditions can change at higher elevation.

On the mountain stands the Drakospito, a megalithic structure built from large stone slabs without mortar, whose builders remain unknown. Its purpose has never been fully explained, making it one of the more puzzling ancient structures found in the Aegean region.