Since humans could imagine it, we've been obsessed with the underworld. A place where our souls would exist after our mortal coils expire. Over time, the notion of this place evolved, becoming more hostile and more dangerous. Gods. Fire. Demons.  The fascination did not stop with the mythology, for many cultures believed that physical gateways to these realms existed all over our world. Lets get in to that. We're talking HELL ON EARTH.