When contemplating a visit to the vibrant city of Lisbon, one might wonder: how many days should I ideally allocate for an immersive experience in this captivating locale? Is it sufficient to spend just a weekend absorbing its art, culture, and culinary delights, or would a longer stay unveil deeper layers of its historical tapestry? What if I seek to explore not only the iconic neighborhoods like Alfama and Bairro Alto, but also the hidden gems scattered throughout the city? Could a span of four days allow me the leisure to savor the delectable Portuguese cuisine in charming eateries, while also indulging in some leisurely strolls along the picturesque streets? Might an extensive itinerary enable me to engage with the local populace, visit renowned museums, and perhaps even embark on a day trip to the enchanting nearby towns? Ultimately, how can one ascertain the optimal duration that balances exploration with relaxation in this remarkable destination?