Depth:
Between 12 and 40+ meters
Diver level:
For the area around the tunnel, Open water is enough but to explore the Barda del Sastre you need a very good level of diving
Characteristics:
This diving area has become world famous but it is a very fragile area since, especially inside the tunnel, you have to avoid touching the walls and ceiling and, in addition, the exhaled bubbles form macro bubbles on the ceiling.
Recommendations:
Be especially careful inside the tunnel
Dive torch