The isthmus is also important in another way. It has been called the bridge of the sea because on the east side is the Saronic Gulf, which opens to the Aegean Sea and the eastern Mediterranean, and on the west side is the Gulf of Corinth, which leads to the Ionian Sea, the Adriatic Sea, and the western Mediterranean.
ის პელოპონესის ნახევარკუნძულს ქვეყნის ძირითად ნაწილთან აერთებს.