Although it is a cavity known for a very long time by the people of the region, who call it Anvenc de Carxano, it does not appear in any of the old catalogues. In fact the oldest speleological exploration that we know of was carried out by members of GES – CMB in October 1956, which went completely unnoticed by speleologists. It is not until 1989 that it is published for the first time after the visit made by GE Rat-penat (Sant Just Desvern) in December 1986.

In our database we have a note (collected from some activities bulletin) that in May 1971 members of GRIS – La Salle Gràcia explored the Avenc del Mas d'en Llorenç (we have not been able to find this mas on any cartography, neither current nor old) and we think it could be the same Avenc de Carxano. We only have two data and they coincide, they are in Gandesa and are 33 metres deep. If any of the members of that trip reads these lines, we would be grateful if they could give us more information about it.

The serres de Pàndols i de Cavalls were one of the settings of the cruellest of all the battles of that ill-named civil war, the Batalla de l'Ebre. Many of the caves of these places served as refuge for the combatants and even today they are practically unknown speleologically. Teresa Rebull in her best-known song, “Paisatge de l'Ebre” explained: Avui he tornat / a la Serra de Pàndols / i a la cova he trobat / les sabates d'en Jaume. / Un forat a la sola, / una pinta de bales, / dins d'un plat enfangat / tres cascots de metralla... For many years all kinds of war materials abandoned on the mountain were found. After the war, economic needs moved many people to recover the scrap iron that had been scattered. Many intact projectiles were made to explode inside the avenc de Carxano, and then they went down the ramp and the 7 metre shaft to collect the resulting shrapnel.