(3) More Knowledgeable
Travel fills in the gaps of knowledge. We all have a deep desire to explore the unknown. Once you begin your journey to explore and get satisfaction from learning something new on your adventure, your thirst for knowledge will grow even more.
If you have always wanted to see an elephant in real life in its habitat, go see it. If you have always wanted to have proper British fish and chips, go do it. It is all part of the learning experience and your personal development.
When you are in a social situation you will be able to confidently share your knowledge with people and maybe inspire someone else to go on an adventure.