Brisippus
Google
Beautiful castle in Sanlúcar with interesting history. It costs about €8-€9 per person and they give you the handheld “tour guide” to use while you’re there. You’re prompted by signage to press the applicable number for the area you are walking through and the guide tells you all about it. We went around noon and there was only a few other people there, however parking was still difficult, so I imagine the earlier you get there, the better. My favorite part was the view from the top of the lord’s tower and the mermaid door.