Antimilos is an uninhabited mass of trachyte (671 m height), often called Erimomilos (Desert Milos).

Ancient inhabitants transformed the crater to an open rain tank.

On the island lives a rare variation of the common goat called Capra aegagrus pictus.

Previously, the island was also known by the name Ephyra (Ancient Greek: Έφυρα)[1] or Ephora (Έφορα, meaning "watchtower"), because one could observe the sea from its highest point over long distances.

Settlement in prehistoric times can be assumed due to remains of walls and arrowheads made of obsidian found on the island.