Parisians agree on loving it: the Luxembourg — its palace (today the Senate) overlooking the basin where little sailboats cruise as they have a century, and the famous green chairs turned however you wish: the Parisian art of sitting itself. Rent a small sailboat for the young — the basin's tradition since 1927; chairs are free and freely moved — the one rule: no visible napping; between Sorbonne and Saint-Germain, the Left Bank walk's natural rest.