Discover the Mighty Mississippi River and the "Gateway to the West" during your upcoming ILLINOISouth adventure. Located minutes from Southern Illinois' western counties, the Gateway Arch in St. Louis has been a regional and cultural landmark since its construction in 1965. You can even take a tram ride to the top of the Arch, the nation's tallest monument at 630 feet! The Gateway Arch overlooks the beautiful and powerful Mississippi River, which made St. Louis the city it is today. Now, over 200 years since steamboats sailed the River, you can ride a replica 19th century paddle-wheel riverboat. Choose from a variety of sightseeing, dinners and specialty outings to experience while you soak in the unbeatable skyline views. Find your history adventure in ILLINOISouth with the help of the Gateway Arch & Riverboats!