Panachaiko, Mountain summit near Patras, Greece

Panachaiko is a mountain massif near Patras with multiple peaks, led by the main summit Palavou Pyrgos. The range also includes the western peak Voidias and is crossed by marked hiking trails.

The mountain contains remains of ancient cities and sanctuaries, including the Salmeniko acropolis and medieval castle ruins at Pournarokastro. These archaeological sites show the long settlement of the area through different historical periods.

The mountain's name comes from its position in Achaea, but until the early 20th century it was better known as Voidias, from a folk tale that a patch of the highest summit stayed dry in Noah's flood, large enough for an ox to stand. Linguists instead link the root to the old Slavic voda, water, fitting the many rivers and torrents that rise here and the Slavic settlement of the 8th century.

Two mountain refuges run by the Patras Mountaineering Club offer shelter and support for hikers. The best access is via well-marked trails, and warm clothing is important since the elevation brings cool conditions.

The wind farm sits in the northern part of the mountain, on the border between Patras and Rio, not on Giorgi Vouno. It is one of Greece's largest, with 57 turbines split into Panachaiko I and II, which began operating in 2006 and 2009.