We are thinking of visiting Spain in September 2013. And noticed the La Merce festival takes place during that time in Barcelona. We are planning on traveling with our 8 year old son. Does La Merce 'take over' Barcelona at that time where you can not enjoy other sites? Is La Merce so crowded it would be hard to enjoy with a young boy? This would also be our first time in Europe.
Any advice is appreciated.