I am so envious that you went to the Prado. It must have been an exciting show. As soon as I saw your post I got to thinking about all the museums nowadays that have virtual tours. I can't find virtual tours on the Prado website but they do have a video of that installation. If you can't go to the garden, at least the garden can come to you.
https://youtu.be/ac5hgzHVLvk