Creepy Warning Signs That Mean Serious Business

We live in a world of unconventional hazards. It might seem cartoonish to think that you might get hit by a propeller, get bit by a plague-carrying rodent or fall down a hidden mineshaft. If those weren't things that could happen, we wouldn't need ominous signs that mean serious business. While sometimes horribly weird and unsettling, these creepy and ominous signs are doing their job.