The cave of Olympi s located on the South part of Chios island, near Olympi village. It was explored in 1985 by the Hellenic Speleological Society and it is open for public since 2003. its maximum depth is 55 meters. Although the cave is relatively small, its interior full of stalactites and stalagmites is exceptional, making it one of the best of its kind in Greece.
The dimensions of the main room of the cave is about 30x30 meters. There are some smaller rooms around it. The roof is covered with stalactites but the most impressive part of the cave is the stalagmites. Furthermore, thanks to the air flows inside the cave, there are eccentrites in it (a kind of stalactite that does not develop vertically) - and they almost look as if they defy the law of gravity!
After the radiocarbon dating of several samples of carbonate material from the Olympi cave, it was estimated that the oldest of them was created 230 thousand ago. The creation of the cave itself is difficult to estimate. Chances are that it began forming 1 to 5 million years ago.
The sun rays, entering from the cave 's natural entrance of the roof, combined with the colors of the cave (red, yellow and white), make a stunning view.