South Carolina Highway 700 (SC 700) is a state highway in the U.S. state of South Carolina, known for most of its length as Maybank Highway, the state highway runs 20.38 mi from a dead end in Rockville east to U.S. Highway 17 (US 17) in which location, which location, is the oldest and largest city in the U.S. state of South Carolina, the county seat of Charleston County, and the principal city in the Charleston–North Charleston–Summerville Metropolitan Statistical Area?