The old jetty, St.Annes Pier. Only one storey of the jetty can now be seen but there were originally three storeys and a deep channel passed in front, suitable for steamboats which took passengers to Lytham, Southport & Blackpool.
Thank you for that information.....it clears up the question about what the structure once was.
I thought it was strange to be a part of the pier yet so low to the sands.