Around the world, thousands of places have economies that revolve around tourism. For better or for worse, the lives of the local communities are deeply affected by the relentless influx of visitors.
It has now come to the point where many of the most sought-after tourist attractions are becoming overcrowded in such a fashion that is disrupting the life of the locals in an unacceptable way.
So, the reactions are multiplying.
Thousands of demonstrators marched through Barcelona...