Just past the island of Portixol, in the direction of the Cap de la Nau, we will find a small islet, the Mona de l’illa, frame of this new door to the blue. The immersion consists of going around it, and for this it is convenient to anchor in front of it, so that we’re about 120º. When descending the anchor line, we will probably find the entrance to a small cave, actually a chimney, that starting at about 11 meters rises to about 7 meters, where there are openings that create beautiful light effects.
It would be best to postpone its entry until the end of the dive and start by going around the mass of rock, whose walls descend progressively as a slope and, in other sections, as abrupt cuts. Its walls full of holes in which never lack dwellers, making possible the encounter with some bank of spits.
The bottom is between 15 and 22 meters and is sandy, with some large stones as a colophon. In a stretch of the route we will see a line of rock that runs almost parallel and which we can also explore and follow until returning to the starting point. At this moment we will enter the chimney, although trying not to muddy the water with the flutter, allowing us back to the anchor.