Aventurien is a setting for Das Schwarze Auge (The Dark Eye) Role-Playing Game.
It is a small, central continent on the world Dere. It's climate zones range from a frosty ice cap in the north, to tropical jungles in the south.
"Das Schwarze Auge (The Dark Eye) fan"
The setting is called, in German, "Aventurien" and, in English, "Aventuria".