Thurgau is a canton in the northeast of Switzerland, located between Lake Constance and the Rhine River. It is known for its picturesque landscapes, with rolling hills, vineyards, and forests. It is also known for its many castles, including the Hohenklingen Castle, the Frauenfeld Castle, and the Warth Castle. Thurgau is also home to many quaint villages, such as Weinfelden, Frauenfeld, and Kreuzlingen, as well as the beautiful Lake Constance.