Helike (Greek Ἑλίκη pronounce [heˈlikɛː], modern [ɛˈʎici]) was an ancient Greek city that sank at night in the winter of 373 BC. The city was located in Achaea, Northern Peloponnesos, two kilometres (12 stadia) from the Corinthian Gulf. The related city of Boura was located nearby. Dora Katsonopoulou, president of the Helike Society, and Steven Soter of the American Museum of Natural History rediscovered the city in the summer 2001, near the village of Rizomylos. The World Monuments Fund included Helike in its 2004 List of 100 Most Endangered Sites in an effort to protect the site from destruction.