Twisted Treeline Bushes

The bushes next to wolves is extraordinarily easy to abuse, and can make jungling a difficult task. There's not enough space between it and the wolves to allow escapes for most champions. The enemy team can reliably camp there for the first few minutes and keep the jungler under-leveled while getting fed. Even if they don't secure a kill, they'll be able to take his farm and likely cause a recall. A bit of distance, or a ward-on-smite effect (like Summoner's Rift wolves) from one of the other camps would bring a lot of help to the situation.