Ga'Hoole

Ga'Hoole is by far the most advanced owl kingdom out of all the six owl kingdoms in regards to knowledge and technology. It's also the home of the legendary Guardians of Ga'Hoole who were considered to be, for the longest time, only a myth. The kingdom of Ga'Hoole itself is surrounded by the Sea of Hoolemere on the Island of Hoole, in the Great Ga'Hoole Tree.