On the morning of 1 November 1755, an earthquake measuring an estimated 8.5 to 9 on the Richter scale levelled most of Lisbon in under six minutes. The fires and tsunami that followed destroyed roughly 85% of the city. But one neighbourhood survived almost entirely intact: Alfama, the ancient Moorish quarter clinging to the hillside above the Tagus. That single geological fact is the key to understanding Lisbon — a city where 900 years of history didn't get buried under 19th-century renovation, but stayed visible, walkable, and alive. A long weekend in Lisbon is genuinely enough time to feel that depth — the Moorish alleyways, the Age of Discovery monuments, the neighbourhood taverns where Fado was born. But only if you spend those three days the right way. This guide is built around what actually rewards slow, curious attention — and what the rushed group-tour itineraries consistently miss.