In the city of Nafplio you can admire its Ancient Acropolis that is built on top of a conical hill, situated at an altitude of 270 meters from the sea and 170 meters from the surrounding area.

The Venetian Castle of Palamidi is at the east of Nafplio's town on a hill at an altitude of 216 meters. It was named after the local hero Palamedes, son of Nafplios. It was built and fortified during the second Venetian period (1686-1715) from Ziaxich and Lassalle. It is a typical baroque fortress and composed of 8 independent bastions.

Bourtzi, a small islet with a castle on it, has been erected by the Venetians, just outside the port, after the withdrawal of Pasha Maxmout in 1473.