A blast furnace is a special type of furnace. They are used to make iron from ore. Blast furnaces are very large. They can be up to 60 metres (200 ft) tall and 15 metres (49 ft) in diameter.
Jonesborough, Tennessee. Jonesborough (historically also Jonesboro) is a town in, and the county seat of, Washington County, Tennessee, in the southeastern United States. The population was 5,975 at the 2010 census. It is Tennessee's oldest town.
About Marshall County. Located in Marshall County, Lewisburg is conveniently located near Interstate 65, halfway between Nashville, Tennessee, and Huntsville, Alabama. Marshall County is home to a number of parks and recreation areas, including the scenic Henry Horton State Park and the beautiful Duck River.