Under the Old Exchange building on East Bay Street is the cellar the British used as a military prison during the occupation of Charleston, holding patriots including signers of the Declaration. Before that the city chained pirates here: Stede Bonnet, the gentleman pirate, and his crew were held in Charleston before being hanged at White Point in 1718 and buried below the low-water mark. The brickwork of the old sea wall is still down there. PUBLIC museum tour, Charleston.
Old Exchange, East Bay Street, Charleston (South Carolina)
See it on the map
Other places on the map within a couple of hours.