At the start of the dive, you will immediately descend down the tract that leads from the anchoring point to the northern wall of the rocky outcropping. After overcoming a detritus slope, you will reach the “coveted milestone”: a series of overlapping rock slabs that form a pyramid-like shoal at a depth of about 30 m, which rises up to just about a dozen metres from the surface. This enormous pile of stones and boulders has created an endless maze of passageways, openings, and impregnable holes. After exploring the large shoal, you can choose between two possibilities: to return along the same path by which you came, and focus your attention upon an area of scattered boulders at depths ranging from 20 to 30 m, or to continue circumnavigating the Petra Nave outcropping counter-clockwise, and focus your attention upon the vertical wall of the outcropping itself.