The island of Gioura (or Gerontia in ancient times) is home to the Cyclops cave, adorned with multicoloured stalagmites and stalactites. This is the largest cave in the Sporades islands and leads to an area that is 40x50 wide, with a height of 15 meters. Finds from the cave include objects not only from the Classical and Roman eras, but from the Mesolithic and Neolithic periods as well. This has shed light on the fishing and hunting habits of the period. Gioura is also home to a rare, protected species of wild goat known as Apra hircus aegagrus.