The truth was that I had not heard of the city of Calella, so I proceeded to look for a little more information: it is also known as Calella de la Costa to differentiate it from the fishing population of Calella de Palafrugell, with which it does not save any similar for the urban agglomeration that presents the first, with only one very long beach ... for 2014 there were 18,307 inhabitants (maybe this is what makes it more comforting and attractive for tourists, because it is a small city with all the amenities for a holiday) ...
In the 1970s and until the mid-1990s, it was a very important tourist destination for Central European tourism (especially German, Dutch, Danish, English and French), being popularly known as Calella de los Alemanes (this explains the festival of Oktoberfest), reaching a tripling of population in the high season of tourism (which coincides with the end of spring, summer and the beginning of autumn). At the moment the tourist variety has been extended, getting to receive visitors of practically all the countries of Europe and Russia ...(https://es.wikipedia.org/wiki/Calella)

Definitely very good your post and recommendation @energyaddict22. Greetings.