Isle of Thizzian

The Isle of Thizzian is an island seen in the season 5 of Dragons: Race to the Edge.

Dragons: Race to the Edge, Season 5
Hiccup and Astrid go to the Isle of Thizzian in search of Sassafras Albidum plants, which grow only on this island. They spend some alone time together and go in a moonlit flight, then go back to the Edge.