......Thanks Pachapapa, I couldn't have found any better myself....
It's a bit like the feminin or masculin article to be used on a new word (le ou la) ie. internet would be le (l'internet) French people (well most of us ) have the knack at picking the correct one, we just know. We leave it to you speaker of french as a second language, to come up with the rules (or my wife but that's the same).
Les voyages forment la jeunesse