Mentirosa de Monistrol

Like all the deceptive springs of Montserrat it has been known since time immemorial and is cited in most works on the mountain. Despite this familiarity, it is not until the campaigns led by Llopis and Thomas (1946-50) that it is explored, surveyed and the first hydrogeological studies of the phenomenon are made. From 1952, members of the then Monistrol delegation of the Club Muntanyenc Barcelonès show interest in the cavity and begin systematic explorations and multiple attempts to overcome the sumps, including an unsuccessful pumping out of the waters. In 1955 they carry out blasting with dynamite to widen some passage that would allow access to the ERE cave divers, but this too proves fruitless.

Despite periodic visits by different groups over the years, it has never been possible to go deeper than the known galleries and there has always been speculation about a hypothetical connection with a no less hypothetical subterranean lake, which has become more a legend than a scientifically based theory.