Gulf of Corinth in the Ionian Sea are connected by the Corinth Canal. It divides the Peloponnese from the Greek mainland by slicing through the small Corinthian Isthmus, so arguably turning the peninsula into an island. Without locks, the canal was excavated across the isthmus at sea level. Many modern ships cannot cross it since it is barely 21.4 meters (70 feet) broad at its base and 6.4 kilometers (4 km) long. Views of Corinth's isthmus are best seen from a height, where you can also take in the city's sheer limestone walls and watch the boats navigating the canal below.

Olympia was a sacred place that attracted worshipers from around the ancient world. Starting from the 8th century BC, the religious celebrations at Olympia became associated with the Sacred Olympic Truce, honored throughout the Greek world following an agreement between the Spartan Lykourgos and the King of Elis, Iphitos. In the 5th century BC, Olympia became a place where ideas were spread, with dozens of thinkers and influential individuals coming here to exchange and pass on their knowledge and ideas.

The Archaeological Museum of Olympia is one of the principal museums of Greece, located in Olympia. It is overseen by the Ministry of Culture and Sports, and, as of 2009, is directed by Georgia Chatzi. When the original building was completed and opened in 1882, it was the first museum in Greece outside of Athens. The museum houses discoveries from the surrounding area, including the site of the Ancient Olympic Games. The collection includes objects produced and used in the area from prehistory to its time under Roman rule. The principal pieces in the museum are Hermes and the Infant Dionysus (attributed to Praxiteles), some objects from the Temple of Zeus, the Nike of Paionios, as well as an oenochoe that belonged to Phidias. The extent of its bronze collection makes it one of the most important in the world.

The archaeological site held over 70 significant buildings, and ruins of many of these survive. Of special interest to Greeks of all times is the Pelopion, the tomb of the quasi-mythical king, ancestor of the Atreids, the two kings who led their domains to war against Troy. The Peloponnesus is named for Pelops. The tomb suggests that he may not have been entirely mythical.