Grosseto Corrado Baccarini Air Base / Grosseto Airport — Grosseto (GR), Italy

GRS refers to Grosseto Airport, officially the Corrado Baccarini Air Base, located in Tuscany, Italy, and primarily operated by the Italian Air Force as a fighter training base. Historically home to interceptor squadrons, GRS has hosted NATO exercises and served as a training location for Italian and allied pilots given its relatively uncongested airspace over the Tuscan coast. Limited civilian charter flights have operated intermittently, particularly seasonal tourist routes connecting to the Maremma region's beaches and countryside, though scheduled commercial service remains sparse compared to nearby Pisa or Florence airports. The base's proximity to the Tyrrhenian Sea and Maremma's agricultural and wine-producing landscape gives Grosseto strategic value for both military patrol missions and potential future civilian tourism expansion in this less-developed corner of Tuscany.