There is absolutely many information that we do not know about countries, our world, and environment that we do not know. School teaches us many things but not everything. There is much information that we do not know.
There are many cultures that have different customs. For example, something usual for you might be offensive to other cultures. Therefore, you should definitely learn this information about different cultures before going to their countries. On the other hand, there are many data regarding mapping, countries, math.
This information in the video will blow your mind. Also, you will impress your friends and family with your knowledge.