Missouri has the Gateway Arch, which is the largest arch in the world; the Ozark Mountains; and the Missouri River, the longest river in North America. It is the second largest cave state in the United States. With more than 6,000 recorded caves, it borders more than eight states, and is known as the Show Me State. Writers Mark Twain, Maya Angelou, and Langston Hughes; actor Brad Pitt; and rapper Nelly, among other notable celebrities, all hail from this great state. Missouri has both mid-western charm and southern neighbors, and, to top it all off, it’s one of the most haunted states in the country.