The traditional mountain village of Platsa is built at an altitude of 370 metres and is 54 kilometres from Kalamata. It has approximately 150 permanent residents. The village's name means "plateau"; in ancient times, it was the mountainous part of the ancient city of Pephnos, Tydareos’ kingdom (father of Beautiful Helen of Troy).
Between the villages of Platsa and Nomitsi is the "Open Theatre of Western Mani". It is a monument of modern culture, with 1560 seats.
The Byzantine and Post-Byzantine temples of Platsa indicate the importance of the village when it was the largest settlement of Mani. The church of the Dormition of the Virgin Mary, located in the centre of the village, and the church of Agios Dimitrios (11th-12th century), with its excellent frescoes, are worth visiting. Also, in the "Kabinari" location, the church of Agios Nikolaos, built in the 10th century, stands out. The church belongs to the oriental basilica type with an octagonal dome and cylindrical arches without windows.
Finally, on the outskirts of the village, there is the church of Agia Paraskevi, built in 1412. It is a single-room, cross-roofed church with frescoes from the 15th century. On the facade, above the entrance gate, visitors can see a built-in rectangular marble slab with an engraved inscription indicating the date of construction of the temple.