The ideal length of time to spend in Madrid depends on your interests and travel preferences. Generally, a 3-4 day visit allows you to explore the city's major attractions, museums, and neighborhoods at a comfortable pace. This duration provides ample time to experience the essential sights, such as the Prado Museum, Royal Palace, Retiro Park, and various bustling markets, while also allowing for leisurely strolls through the city and indulging in Madrid's culinary scene. However, if you're passionate about art, history, or architecture, you may wish to extend your stay to 5-7 days, providing more time to discover lesser-known attractions, museums, and galleries. A longer visit also enables you to take day trips to nearby destinations like Toledo, Segovia, or El Escorial, further enriching your Spanish adventure.