Parque de la Artilleria, a free museum showing a range of artillery from across recent centuries and used to defend Spain. In particular, there are a lot of canons used as anti-aircraft weapons but also some of the weapons used during the civil war. There is much of interest and as it’s free there is no reason not to pop in many times (I need to go again with my flash as I forgot to take it this time). They have a 3D model of the local area showing how it has been defended over the years. Quite interesting to look at some of the running routes we have run.