The Morris Island Lighthouse build in 1873 is situated on a small sand bar in the mouth of Charleston Harbor .  The lighthouse originally marked the southern mouth of the harbor, but changing currents and erosion over the past 140 years have left the lighthouse standing a quarter mile off shore.  The light is decommissioned and has not been lit for years. The light is not accessible by land and even those with a boat are forbidden from entering the structure.  The light is best viewed from a city park at the north end of Folly Island .  The park on Folly Island in addition to a great viewing location for the lighthouse is also a wonderful place to enjoy a relatively uncrowded walk on the beach.