The fortress was constructed using materials salvaged from the nearby ancient city of Pylos.
During the 15th century, the site served as a base for pirates before being heavily fortified by the Ottomans in the 16th century.
The location is often associated with the Nestor’s Cave, a cavern located below the fortress walls where mythological legends place King Nestor's cattle herds.
The Venetian Republic took control of the site in 1686, but it lost its military significance to the newer Neokastro shortly thereafter.
The fortress played a role in the naval operations of the Morean War due to its command over the harbor entrance.
The site remains largely unexcavated, meaning many structural foundations are still buried beneath earth and vegetation.
The Old Navarino Fortress, known locally as Palaiokastro, is a 13th-century Frankish fortification situated on a steep cliff overlooking the Ionian Sea and Voidokilia Bay. Built by the de la Roche family in 1278, the structure was strategically positioned to control the entrance to Navarino Bay. It stands opposite the later Ottoman-built Neokastro, which guards the southern end of the bay. The site features significant remnants of high stone defensive walls, vaulted cisterns, and secondary defensive towers. Much of the current masonry reflects later Venetian and Ottoman modifications made during their respective occupations of the region. The fortress remains largely unrestored, offering an authentic ruin experience with minimal modern intervention. It sits at an elevation that provides panoramic views of the Gialova Lagoon and the Mediterranean coastline. The path to the summit is rugged, passing through dense maquis shrubland and exposed limestone terrain.
The western ramparts provide an unobstructed view of the semicircular Voidokilia Beach below.
Wear sturdy, closed-toe hiking shoes as the terrain is rocky, steep, and often slippery.
Carry plenty of water and sun protection, as there is no shade or facilities within the fortress ruins.
Visit the nearby Nestor's Cave located on the trail leading up to the fortress.
Attempting the climb in flip-flops or during peak midday summer heat; also, do not rely on GPS signal reliability inside the thick stone ruins.
Avoid climbing on unstable masonry walls; stay on marked paths to protect the site's archaeological integrity.
