Cannonball Grotto is a cave in the Needle Hills. It can only be entered through the Upper River Bank, which lies to the east. It is the most southwesterly area of the region, and is home to wasp viperwolves and baby stems.
Avatar: The Game Edit
Able Ryder entered the cave to retrieve the unobtanium shard that lay within. He was able to retrieve it despite the presence of hostile Na'vi in the cave.
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