The XYZ abbreviations were used in the mapping of the 20s and 30s of last century, referring to the UTM coordinates. But here in Viver have a very different meaning.
Under these acronyms, one of the strongest Republican defensive lines created during the Civil War is hidden.
This "iron belt", also called "Matallana line," as this is the name of Colonel who is credited with its design, construction began in April 1938, in anticipation of the attack of National troops in Valencia.
It consisted of 14 Centers of Resistance, and the center we can visit here, in Viver, was number 7, which ran through the municipalities of Jérica and Viver, with defensive positions beating the old General Road Sagunto-Burgos, and the plains between Viver and Torás.
Air Raid Shelter in La Floresta park
Republican troops position
In Viver, are preserved in extraordinary ways, two of those defensive positions belonging to that line: San Roque and Santa Cruz, whose importance was extreme in the defense of Valencia, it was just between the two, where the Republican troops managed to stop the advance of National troops.
The basic typology used in the works of these positions is that of a strong defensive trench with slip road towards rear positions, and numerous underground shelters whose mission was to give shelter to the defenders of numerous artillery bombardments and aviation.