Drakolakkoi

In the area of St. John of the White Mountains. Has a length of one kilometer while inside there is fine white sand and water. It is an underground river that empties the summer of water and can be visited. Been explored in depth 1750 meters and has been mapped by cavers. Up to 400 meters can be visited any long as it has good lens and helmet from the 400 meters and then need special equipment and expertise. To reach someone over there must traverse 6 km dirt road from St. John as a percussionist and after an hour of walking.