"Hidden under the former battlefields of WWI lie hundreds of forgotten rock quarries that were transformed into underground cities beneath the trenches, sheltering armies on both sides of the Great War from mass destruction. Cloaked in darkness under private land in the beautiful French countryside, these underground cities are bristling with artifacts, sculptures and emotionally charged “graffiti” created by WWI soldiers a century ago."
Thank you for the link. The images are of an impressive artistic and technical quality. While I wouldn't say it takes hours to explore them, they are really worth a look.
They include traces of an Hungarian infantryman on the Western front and of Germans who as late as 1918 had the nerve to carve artwork in stone. Pity most contain little captions with information about locations, etc. Regards, Pat
