Union Cemetery is an important piece of the region's history. Look out for any epitaphs which often include a bounty of fascinating facts.
You'll have no end of sightseeing choices when in Steubenville. Union Cemetery is a good place to kick off here, but there are loads of other worthwhile sights to visit. Franciscan University of Steubenville, East Gateway Community College, and Old Fort Steuben are close to the burial ground and will round out your day nicely.