Sartaba, Jordan Valley, Israel, December 2013.

The cone-shaped mountain which bears the ruins of the Hasmonean fortress of Sartaba, also called Alexandrion or Alexandrium, was built in the first century BCE by the Hasmonean King Alexander Jannaeus and is mentioned in ancient Jewish sources as the second station from which signal fires were relayed from the Mount of Olives in Jerusalem to announce the new moon to Babylonia.