Confusion & feeling fulfillment

A funny experience really, now that I think of it afterwards.
I should have suspected that something would go wrong when my aunt muttered the words "What's the worse that could happen?". Really aunt, have we not seen enough movies?
Everything started normally from the flight from Athens to Rome, admiring the view while taking off and landing, a couple of hours later. The remote and full of color farms, with the afternoon sun falling just right.
The flight from Rome to Paris went smoothly as well, me sitting near the window again and my friend sleeping next to me. One of the things I remember most clearly about this journey, was passing over the Alps. It was breathtaking, the sheer size, as well as the completely snow filled mountains amazed me. Sitting there seeing what I could from the really small window, half of which was the airplane wing, I was trying to catch any small amount of life. I saw a village here and there, and it was enough to feed the adventure seeking demon inside me. Despite the fact that I would probably freeze to death.
As we were landing on CDG we were trying to see if we could see anywhere in the distance the Eiffel Tower. Yeah, no such luck, since CDG is outside of the city. Hope, nevertheless, dies last. Having arrived 5 hours earlier than our train to Rennes was leaving, we thought we had an abundance of time to get there, even have a small walk near the train station once we got there. But there lies the problem of one of the most frustrating days of my life. The getting there. Since it was the first time both of us had been to France, and neither of us spoke French, we had as an information source a common friend, who had made the journey recently, and whom we were going to visit. She instructed us to go to the underground metro line and use the one which goes straight to gare Montparnasse, for free. Having done research of our own, we could not find such a line from CDG. But what the heck, she knew more. After the first 3 hours had gone by we learnt that something free, fast and comfortable does not exist. The 4th hour we gave up, because we had now only 1 hour to go from CDG to the station. We took the normal metro, not for free. And we were there 45 minutes later. But alas, how do we find the departing station now? Let me say that running in a packed underground place is not easy! Thanks to our luck and the kind 1645 people we asked for directions, we got there literally 1 minute before the train left. Phew!