One of my favorite parts about getting to the top of Gibraltar was seeing the Strait from a new vantage point. I could look left and see Morocco and I could look right and see Spain - without worrying about oncoming traffic! Gibraltar was very 'limey'. The stark white cliffs were stunning in the sun.
Being a little lower on The Rock you could see the ventilation holes / canon ports that are part of the tunnel system.
What I want to remember most about the views:
Algeciras Bay full of large commercial ships, the misty Mountains in Morocco, the circling white birds, cannon ports and all the history of the tunnels, and sun drenched cliffs.