Cautious Photography
Due to strict modesty laws in Saudi Arabia, snapping pictures of women is not allowed. If you wish to take pictures of Saudi men, then you will not have any issues. You will only have to get permission, of course.
Protecting Its Borders
Because of its restless borders, the Saudi kingdom has built fences and walls to ward off threats from neighboring countries. Two examples of these threats are the ISIS coming in from the north and the Yemeni civil war that has erupted south of Saudi Arabia.