Visitors can enter in the Green Grotto with smaller boat, or diving. Before entering, visitors have better leave underwater lamps in order to enjoy the sea from the spherical vault of the cave and penetrating to a depth of 3-5 meters. The dive starts at the left point 60 m from the entrance to the Green grotto; this is the simpliest anchoring site because it advoids disturbing other visitors. At the depth of 26-35 meters of depth, it is another cave, 20 m deep, resembling the work of modern archiect because of its neat and regular edges. The grotto can be entered from the left or righthand side of the central pillar which separates the two entrances. On the top of cave is a small hole so flair of light came in the dark inside and create green spot on the surface and under water too.