Paseo de la Princesa is a picturesque, accessible promenade along the historic city walls of Old San Juan, ideal for leisurely strolls and offering scenic bay views. It's free to visit and perfect for solo exploration, though it can also be incorporated into a guided tour of the old city. Enjoyable year-round, it's particularly vibrant on weekends with street vendors and performers; however, consider visiting during cooler mornings or late afternoons to avoid peak heat, especially in summer. A typical visit lasts 1-2 hours, incurring costs only if you purchase food, drinks, or souvenirs from the various stalls and cafes found along the path, making a budget of $10-30+ appropriate for refreshments. This historic walkway is excellent for photography, especially around sunset, and links well with other Old San Juan attractions.