Drive or walk till the cemetery on the north-est end of Leonidio. When the paved road ends continue the off-road path continuously uphill till the road ends. Park below the olive trees. On foot, follow the obvious red-marks and stone-towers for 15-20min, first uphill, then traversing to the right. You’ll cross a tall man-made stone wall and 2 white fixed ropes till the obvious plateau below the red stalactite wall.