There are quite a few cobblestone streets in Charleston. The stones, which were brought by the early sailing trading ships (they were used as ballast on the voyage to Charleston and then discarded when they picked up their cargo), are now picturesque, but rough to drive on! The most famous cobblestone street in Charleston is Chalmers Street. Home to the “Pink House” — which is thought to be the oldest structure in Charleston (and one of the oldest in South Carolina), Chalmers is a must walk-through for anyone visiting Charleston.