Join this absolutely unique and ambitious tour to experience four of Switzerland’s most spectacular panoramic express routes—all in one unforgettable day. Start in Zurich and ride east to St. Gallen, then board the Voralpen-Express for the scenic run to Luzern through rolling hills, lakes, and picturesque countryside. Continue on the Luzern–Interlaken Express, winding past waterfalls, meadows, and snowy peaks. From Interlaken travel on the GoldenPass Express via Gstaad to Montreux, crossing high passes and terraced vineyards. Head south through the Simplon region to Domodossola and ride the Centovalli Express to Locarno—narrow-gauge marvel through deep gorges and stone villages. Turn north via Bellinzona and race through the Gotthard Base Tunnel, the world’s longest, before returning to Zurich. Covering nearly 900 km in one day, this adventure is truly hard core—built for serious rail enthusiasts. A thrilling, fast-paced full-circle rail journey across the Alps. Exhaustion guaranteed!