How to see what you don't see

This is a picture of Retiro Gardens in Madrid (Spain). Between 1630 and 1640 the Count of Olivares and Duke of San Lukar gave the King of Spain Felipe IV some land next to Jeronimos monastery in Madrid. From then to now different kings built different areas in the gardens. 150 years later King Carlos III opened the gardens to the public.
Thanks to all these events today I walk around the Retiro Gardens after having lunch. It is healthy, enjoyable and even now I discover new places inside it.