Lisbon is lived uphill: the maze of Alfama with fado in the background, tram 28, the viewpoints over the Tagus and, in Belém, the tower, the Jerónimos monastery and warm pastéis de nata.
2 to 4 days are perfect, and the day trip to Sintra (Pena Palace) is worth a full day. Comfortable shoes, a flexible plan and a neighborhood-based itinerary the AI generates instantly, with an estimated budget in euros.