The Porta delle Cornacchie is a rocky ridge at about 1,200 m, formed by 11 reddish porphyry boulders, 2.5 to 3 meters high, lined up on the edge of a precipice, into which two of these boulders would appear to have fallen, creating an opening in the “enclosure,” from which the name “Porta delle Cornacchie” would originate. The boulders are arranged almost regularly, and what characterizes them is the clean cut that divides them. But the really strange thing is the fact that the entire complex rests on a base of sandstone, a material that has absolutely nothing to do with porphyry.
All this has led to the suggestion of a number of hypotheses about their origin, which may not be natural but derived from the hand of man. The Trevigliese historian Santagiuliana, in 1963, had already hypothesized them as a possible megalithic structure, shaped for defensive and/or religious purposes by a very ancient civilization that populated these areas. They stand on the watershed between Roncobello and Isola di Fondra.
