Bonsoir,
Voici quelques petites choses à corriger but your essay is very good:
I think that travelling is a way to discover another place in the world than where you live. Futhermore, you can encounter new people, new culture, new lifestyles .. Consequently, you can learn many things and you open your mind. However, for me, travel  should be an exchange between two cultures and you shouldn't take advantage of the hospitality or ignorance of the population.
If you are narrow-minded or if you have prejudices against foreigners it will be difficult to broaden your mind during a (the) trip. Moreover, for  my opinion, travel  like an adventurer or a hitchhiker who hits the road open the mind more than staying in a hotel without meeting the local population. Indeed, if you have the will a trip has many virtues and allows for example to step back or become more mature. Personally I had the chance to do a few trip (pluriel) and this experience are (temps!) very interesting.
To conclude, I saw that travel open the mind, provided you open to others and accept the difference.