text:  Hello and welcome to the show that's all about your online habits, from the podcasts that you've been downloading and playing to the articles that you've been reading and the social media posts you've been sharing. This week, a fascinating mix. I'm Anna Doble and this is Pick of the World. In a moment, a trip to one of Spain's most iconic buildings. But first, a story from our assignment programme that's hooked in more than 4 million of you on the BBC News website.