I took the free tour of the Cathedral of Malaga, really interesting and with many good explanations about the architecture, as well as the chapels and the different historical styles of this cathedral, highly, highly recommended, the guide was very good.
Then I took another tour of Málaga Misteriosa, the guide (I think her name was María), put a lot of passion into feeling the atmosphere of the different stories that were happening in the streets of Málaga, more gruesome stories but also very funny stories, also highly recommended .