Calydonian Boar
The Achelous River separates Aetolia () from Acarnania to the west; on the north it had boundaries with Epirus and Thessaly; on the east with the Ozolian Locrians; and on the south the entrance to the Corinthian Gulf defined the limits of Aetolia. In classical times Aetolia comprised two parts: Old Aetolia in the west, from the Achelous to the Evenus and Calydon; and New Aetolia or Acquired Aetolia in the east, from the Evenus and Calydon to the Ozolian Locrians. The country has a level and fruitful coastal region, but an unproductive and mountainous interior. The mountains contained many wild beasts, and acquired fame in Greek mythology as the scene of the hunt for the Calydonian Boar.