When “urban explorers” poke through abandoned mines, they face big dangers like chemicals, explosives, and toxic fumes. But there are tiny dangers, too. Just walking through an old mine can knock loose small rocks. After falling a few hundred feet, these mini missiles — no bigger than a peanut — can smash right through an unprotected skull!
Can you find the 14 peanut-sized rocks hidden in this mine before they find the explorer's head?