A number of years ago now I took part in a "fundamental retreat" at the Foyer of Charity at Chateauneuf de Galaure. I took the opportunity to undertake a similar retreat there a second time shortly afterwards. This community is the home from which the Foyers were founded. The charism of the Foyers of Charity is described in English here.
My experience of the Foyers made this account of a participation in the World Youth Day in Krakow particularly attractive. The inspiration of the "fundamental retreat" foreshadows what is now the idea of a "new evangelisation", so it has a particular relevance to World Youth Day.