In addition to what other people have mentioned, there is an interesting section half way into the article regarding the history that lead to this high density

In addition to what other people have mentioned, there is an interesting section half way into the article regarding the history that lead to this high density of quality in a comparatively small town. Apparently the owners of two competing hotels, over the course of generations, tried to outdo each other. So this plays nicely into some of the HN interest in competition as a positive, motivating factor in success. ;)