Paris offers plenty of free or budget-friendly activities for travelers. You can explore iconic landmarks like Notre Dame Cathedral and the Palace of Versailles for free or at a minimal cost. Additionally, wandering through picturesque neighborhoods like Montmartre or Le Marais doesn't cost a thing and allows you to soak in the city's vibrant atmosphere. For a cheap and cultural experience, consider visiting local markets or enjoying a picnic in one of Paris's beautiful parks.