The Island of Tomorrow is a large island in the West of the Barbaric Archipelago in the book series. One hundred years before the birth of Hiccup Horrendous Haddock III, Tomorrow had been the location of the capital city and castle of the Kingdom of the Wilderwest. Grimbeard the Ghastly was the last King of the Wilderwest before Hiccup was crowned the new King in How to Fight a Dragon's Fury. When Grimbeard mistakenly killed his son, Hiccup Horrendous Haddock II, the island was abandoned and cursed.