Il Tunnel (del Cabirol / Sommergibile Tunnel)

The site sits on the fully west-facing wall of the Capo Caccia headland, so its exposed window is the open Mediterranean from the SW through W to WNW — the sectors that catch the dominant Libeccio (SW) and Mistral/Tramuntana (NW) wind-seas of the west Sardinian coast, all at or near 1.0. The headland bulk to the east completely blocks the NE-E-SE quadrant, and the cape's southern promontory shadows the S sector; to the north and northwest the Capo Caccia tip and Foradada island cut down N-NNW swell. Because there is no true ocean groundswell in the west Med, conditions hinge on local wind fetch: a WSW-to-NW blow builds surge straight onto this wall and makes both the tunnel mouth and the cliff exit unworkable, so the dive is run on calm, offshore-wind days.