Arkansas is a state in the southern United States that borders the Mississippi River. It is well-known for its abundance of park and wilderness areas, with topography that includes mountains, caverns, rivers, hot springs, and other natural features. Hiking paths and limestone caverns, such as Blanchard Springs Caverns, may be found in the mountainous Ozarks area of the state's northwest. The Clinton Presidential Center, which houses Bill Clinton's presidential records, is located in the state's capital, Little Rock.