The Serbonian Bog (Greek: Σιρβωνίδος λίμνη, romanized: Sirbōnidos limnē, Latin: Sirbonis Lacus, Arabic: مستنقع سربون, romanized: Mustanqaʿ Sirbūn) was an area of wetland in a lagoon lying between the eastern Nile Delta, the Isthmus of Suez, Mount Casius, and the Mediterranean Sea in Egypt, with Lake Sirbonis at its center.[1] The lagoon still exists, and is the second-largest in Egypt.[2]: 13 The bog is used as a metaphor in English for an inextricable situation.