25 Pesos Ibero-American Series - Serranias del Hornocal

Argentina's Ibero-American series has run since 1991 as a joint commemorative program among Spanish- and Portuguese-speaking nations, with each participating country contributing a rotating subject drawn from natural or cultural heritage. The Serranías del Hornocal — a formation of violently folded Cretaceous-era sedimentary strata in Jujuy Province — was designated part of the Quebrada de Humahuaca UNESCO World Heritage Site in 2003, which likely drove its selection here.

The Casa de Moneda struck this issue in .925 silver at a modest mintage, consistent with the collector-focused nature of the broader series.