You were so lucky to see dolphins and I envy you right now 🙂 I was never this lucky.
I think you were not supposed to open that window though. But on the other hand, when it was possible then why not? They should somehow block it if they don't want people to open it.
Steep and narrow stairs in towers are scary to me too. I'm claustrophobic but we found a way with my husband to fight my fear a bit. He gave me a small pocket light and I use it every time. It sounds silly but it's comforting.
Great photos, especially the collage.
Thank you for sharing!