Towns bombed during the Spanish Civil War that were not rebuilt after the battle; an international station full of double spies for the Nazis and the allies, which currently hides underground a cutting-edge laboratory that investigates the dark matter of the universe; an old military powder magazine excavated in the bowels of a mountain, a winery that preserves the large silos in a unique architectural enclave or various laboratories in which their experiments were frozen in time after the cessation of activity. The old Belchite and the Canfranc railway station are the great temples of urban exploration in Spain, but there are many other abandoned places that sometimes go unnoticed even by the neighbors, who treasure a past full of history, about to disappear in oblivion