Pierhead Building and dolphins
The iconic Pierhead Building, seen in the background here, was built in 1897 as the headquarters for the Bute Dock Company.
Dolphins is a generic name for man-made structures that typically consist of a number of piles driven into the seabed or riverbed, and connected above the water level to provide a platform or fixing point.
In this instance the dolphins are the remain of the landing stage for P & A Campbell White Funnel fleet that ran excursions across the Bristol Channel.