Cannibal Isle is a location first seen on the map in How to Train Your Dragon.
Cannibal Isle is first seen in the map of Berk and Meathead Islands at the front of the Book.
In the Epilogue of Book 4, an older Hiccup talks about reuniting with the Doomfang he encountered during the plot of Book 4. This Doomfang becomes 'Hiccup's Guardian Angel', and saves him from many dangerous situations at sea, such as rescuing him "from shipwreck on Cannibal Isle".
|The Barbaric Archipelago of|
|Locations of the Isle of Berk and the Meathead Islands|