Gates on both sides, let people know about incoming planes, like an incoming train. Sometimes police have to force people off the runway who aren't paying attention and are to busy taking pics of the incoming plane. I heard of one story in which a man thought the run way was a parking lot and drove down the runway parking at one of the terminal gates.
Click this link for Top 10 most Dangerous Airports in the World
At the base of the rock of Gibraltar is the town. 30,000 people pack into a small area. There are lots of great stores and restaurants, but the most amazing feature of Gibraltar is the huge rock. The locals just call it "the rock" or "Gib" for short. It once was called Mons Calpe, one of the Pillars of Hercules.
It's a short hike to the top, that gives you stunning views of the surrounding area. You can see the African Continent in the distance on clear days. Those who are less adventurous can take a tram to the top. Where they can explore caves, photograph the only wild monkeys in Europe, or visit the gift store.
Gate for the cars and pedestrians, so they don't cross when a plan lands or is taking off.
Monkeys have taken over the look outs. Brought over as pets from Morocco, they now live on the mountain side.
You can take a tram to the top, a taxis, or you can walk. Walking was more fun, but as you can see isn't the easiest way to the top.
Gibraltar from the ocean as I was heading to Africa
Panoramic of Strait of Gibraltar. African continent on the left, Europe on the right.