“In Urbasa there are numerous chasms and cervices which make it an ideal destination for potholing enthusiasts.”
“In the high valleys in Sobrarbe, this process was carried out by the subterranean water flow through the network of cervices in the Hercynian massif.”
“Archaeologists came to look at the site giving their opinion of what they thought the rock surface cervices to be along with that of our Spiritual Elder.”