Avenc and torrente de son pou - senderomallorca.es

Because Avenc and not Cueva, it is called avenc because when they found it the only entrance that it had was through a hole in the ceiling of about 9 meters long, and with a depth of about 55 meters.
In the year 1894 a tunnel was excavated to be able to enter inside the cave or avenc, and to be able to extract all the guano that still deposited the pigeons and bats in all that time.

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muy buenas tomas :) saludos