Heraclea Pontica (;
Herakleia Pontike) was an ancient city on the coast of
Bithynia in
Asia Minor, at the mouth of the river
Lycus. It was founded by the Greek city-state of
Megara in approximately 560–558 and was named after
Heracles whom the Greeks believed entered the underworld at a cave on the adjoining Archerusian promontory (
Cape Baba). The site is now the location of the modern city
Karadeniz Eregli, in the
Zonguldak Province of
Turkey.