The imposing Castle of Kalamata stands on a hill above the historic centre of the city, overlooking the area at a large radius, which was its initial purpose.

Palaiokastro, on the northern side of the Navarino Bay, was built around the 13th century by Franks and is the oldest of the two castles located in the area.

The castle of Koroni is situated at the southeastern part of the Messenian Bay; in the 13th century it was, along with the castle of Methoni, a significant commercial centre and a communication hub between the west and the east.

The castle of Methoni, one of the most typical castle town examples in Greece, stands imposingly on the southwestern part of the Peloponnese. Right next to it is the small fortified island of Bourtzi, with which it is connected through a small arched bridge.

The castle of Zarnata is situated at the northwestern border of Mani, close to the town of Kambos, in Avia. It is one of the most important castles in the area, built on a hill amidst a verdant valley.

The Kapetanakides tower, known also as the Kapetanakides Castle, stands imposingly on top of a hill, the so-called Petrovouni, in the village of Charavgi, in Sotirianika.

Near the entrance to the port of Pylos lies Niokastro, otherwise known as Neo Navarino, which stands as a vigilant guard, protecting the area from the vulnerable side of the sea.