Stenosia, formerly referred to as Lezagas, is built at an altitude of 177 metres and has approximately 400 permanent residents. It is 4.5 kilometres from Chandrinos and 11.5 kilometres from Pylos. During antiquity, the area was part of Nestor's kingdom, ancient Pylos, and during the Second Venetian period, it was referred to as Lesaga.
In Stenosia, visitors can see the church of Saints Constantine and Helen, while a short distance from the village, there is a green gorge and small waterfalls of the small river of the same name. The river is 3-4 kilometres long and ends at the Kalamari waterfall in Pylia. According to local history, on the Stenosia river, the Italians had built a dam and the first hydroelectric station in Messenia, which supplied electricity to Pylos.