Fahd Batayneh فهد بطاينة
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This is one of few historical landmarks in Aqaba, and is worth the visit.
The place is very well-maintained, and involves rooms, stables, and a mosque.
The place involves climbing stairs and walking through dark paths.
The fort entrance has some lovely and visible Arabic writings.
Entering the place is free, and expect to spend around 15-30 minutes exploring.
Adjacent to the fort is the Sherif Hussein bin Ali Museum (AKA Aqaba Museum). The Aqaba Flag Pole is within walking distance, and so are plenty of restaurants and cafes.