The historic South Carolina coast near Charleston has had an amazing light show since colonial times, with a myriad of mesmerizing towers that guided ships in from the sea. Some of the oldest are still standing, helped by old and new technologies and the determination of a new age of lighthouse keepers. What has shone light for so many nights in Charleston history has a singular history that is doubly delightful. The landmark lighthouses and channel markers that guided seafarers for generations have a host of intriguing details, including one ingenious concept that kept one sentinel intact in two different locations.