When you need to try out a new flashlight, and you get the opportunity to do so in the form of a solitary tour of a hundreds-year-old mining operation from the time of Leonardo da Vinci. Narrow passages following a vein, with ore pits with original wooden pipes, created with handcuffs and a thresher, then fire, and those that were expanded with explosives in the 1980s and fitted with the world's s...
