The cave Ahnistres is located west of the seaside village of Milatos, at an altitude of 70 meters and it has two entrances, quite covered by dense vegetation. One entrance is precipitous with 4m depth, while the main entrance, 1.5m wide, leads to a descending aisle, 6m long, ending at a passage 0.5X0.5m. The first room with the precipitous entrance has also a small opening that leads to the main cave with impressive stalagmites and columns that divide the room into several parts.
Although the cave is inactive, the decor is very impressive and well developed, with most impressive being a series of columns with height 2 - 7m and almost 40m long. At the southern part of the cave there is another array up to 12m high.
Although the cave is not very large, it has many levels and many rooms and two of them require the use of rope. During the winter months there is water drip making the ground quite muddy and slippery.