Helike (/ˈhɛlɪkiː/; Greek: Ἑλίκη, pronounced [heˈlikɛː], modern Greek pronunciation: [eˈlici]) was an ancient Greek city that was submerged by a tsunami in the winter of 373 BC. It was located in Achaea, northern Peloponnesos, two kilometres (12 stadia) from the Corinthian Gulf and near the city of Boura, which, like Helike, was a member of the Achaean League. Modern research attributes the catastrophe to an earthquake and accompanying tsunami which destroyed and submerged the city.