The Wall

Known only as The Wall the border of the werewolf capital is a huge wall that is made out of materials that even demons can't get through. The border sends off a signal-jamming virus that stops machines from detecting the city within it's borders. Although it's hard to do the werewolves are capable of climbing over this wall but can be shot if spotted doing it. You are supposed to pass through the heavily guarded gates, and anyone caught trespassing will be disposed of.