We were in Iquique anyway to visit the Humberstone WHS so had the opportunity to see Baquedano street which, other than the (cold) beach seemed to be the only thing to do in the city itself. Iquique was historically significant as a major export port for the saltpeter industry coming from the likes of Humberstone. As such, although it was isolated on a hostile, desert coast, it continued to grow and prosper along with the nearby mining industry and had a significant international population which influenced the architecture and lifestyle of the area from the late 1800's to early 1900's. 

Baquedano street runs for about 1 km from the coast to the small but pretty Prat square is the remainder of the wealth and glory days with many fine homes and buildings built by the wealthy of the time. It has mostly been restored and other than the street tram is pedestrianized. Our visit was short but sweet and certainly worthwhile if in the area already. It has the international connection that Unesco looks for but as a stand alone inscription seems weak. Mentally we just tried to consider it as an extention of the Humberstone WHS because they are so closely linked.