Named Calavera, wich means skull, because the three holes on the roof gives the impression of being inside a skull. This place has an amazing halocline and the diver will feel a little variation of temperature between the fresh and salt water. 

This dive requires a good control of the neutral buoyancy because the sediment is very light like baby powder. Very nice green light effects from the main opening and surprising tree branches falling from the center hill. A very diferent dive!