The Ancient Diolkos in the Isthmus of Corinth a very important monument of Greek antiquity is the first systematic attempt to transport goods and ships from the Saronic Gulf to the Corinthian Gulf and vice versa For this purpose in the 6th century BC and probably on Periandros was constructed from the beach of Schinounda until the western end of the current canal between the modern city of Corinth and Loutraki stone-paved road with grooves used for rolling the wheeled vehicles on which the ships were transported.