Outhouse with a View

Charleston's Fort Moultrie sits right on the beach, just outside of Charleston Harbor. I'm not sure what this little building, perched along the edge of the beach, was used for. It was probably a pillbox for observers or the entry to a supply tunnel.  I could Google it but I prefer to think it was a brick outhouse with a million dollar view. 

This photograph was captured with a Sony a6300.