Four days is the sweet spot for a first visit to Madrid, turning a three-day sprint into a proper holiday with room to breathe. Days one to three cover the essentials: the art triangle (Prado, Reina Sofia for Guernica, Thyssen), the Habsburg old core (Royal Palace, Plaza Mayor, Sol, Temple of Debod), and a barrio day through La Latina, El Rastro and Malasana. Day four is the release valve, and you have real choices: elegant Salamanca and Serrano shopping paired with a Bernabeu stadium tour, or a full day trip to Toledo, 33 minutes by high-speed train, or to Segovia for its Roman aqueduct and fairytale Alcazar, about 30 minutes by train. This length suits travelers who hate the forced march, couples, and anyone whose flights bookend the trip awkwardly. Base in La Latina for four days: you have accepted a slower pace, and its tapas lanes and Sunday market make coming home each night the best part. Book the Prado, the Royal Palace, and the Bernabeu ahead.