Well, if you ask me, there is need to share your experiences or places where you have been before and the beautiful sceneries, it makes one feel they belong and are impacting to people's lives positively.

When you share and post things you encounter especially in your journies and excursions, it creates room for other people to also venture into that aspect, probably seeking for things that makes them happy and all that.

Some people likes traveling and site seeing alot which gives them joy and happiness, so when you post some of the fun places you have been too, they would like to give the place a try too.
All I'm saying is, that post you make can brighten someone's mood