Montseny

Descend to the top of the oval ridge at around 20 metres and choose a direction — the shape lets you circuit the entire structure rather than swimming a linear out-and-back. The rock hosts the standard Maresme cast of morays, scorpionfish, and conger eels in its crevices, with groupers holding position at the edges. Check the sand on both sides for electric rays, which have been recorded here in late summer. Yellow sponges dot the rock surface in places, adding patches of colour. The average depth sits right in the zone where Nitrox makes a material difference to how much of the ridge you can cover.

Montseny's oval footprint sets it apart from the linear ridges that define most Maresme diving. Instead of following a ridge to its end and turning back, you can work around the structure in a single loop, checking different exposures and habitats as the rock curves. The site sees modest but steady diver traffic, speaking to its role as a reliable mid-depth option in the Port Balis roster. The late-summer electric ray sightings on the flanking sand give it a seasonal draw that the shallower ridges lack.