On your third day, venture across the Arno River to the Oltrarno district. Start your day by visiting the Basilica di Santo Spirito, a beautiful church known for its elegant facade and stunning interior. Explore the neighborhood's narrow streets, lined with artisan workshops and boutiques. Visit the Palazzo Pitti, a magnificent palace that houses several museums, including the Palatine Gallery and the Royal Apartments. Enjoy a leisurely lunch at a local trattoria and then head to the Boboli Gardens, located behind the palace. Spend the afternoon wandering through the lush gardens and enjoying the peaceful atmosphere.