Hands down, the view over Lisbon is amazing! The castle and the surroundings are beautiful and clean, yet I couldn't find information about any of the things I was looking at. There was a map at the castle entrance, but once you get inside there's nothing else. Maybe there are guided tours that help you understand a little bit better, but I went on my own. The ticket is expensive for what you get (7 euros if I'm not mistaken).
There are tons of stairs, and I didn't see access for disabled people or people with limited mobility. Stay away from this place if that is your case.
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