Horn is a municipality in the district of Arbon in the canton of what and is also a northeast canton of Switzerland?
Horn, Switzerland Horn is a municipality in the district of Arbon in the canton of Thurgau in Switzerland. Horn is an exclave of Thurgau, enclaved in the canton of St. Gallen.
Oberrheintal District Oberrheintal District (German: "Bezirk Oberrheintal" ) is a former district of the canton of St. Gallen in Switzerland.