Moorish Castle

The Castelo dos Mouros is the walk-the-walls experience of a Sintra day. The fortress was built by the Moors, who ruled this part of the Iberian Peninsula for centuries, to watch over the land and sea approaches below; after Lisbon fell to the first king of Portugal, Afonso Henriques, in 1147, the castle passed to the Christians and gradually lost its purpose, until by the nineteenth century it was an overgrown ruin. Its revival came from King Ferdinand II, the same romantic consort who built Pena Palace on the neighbouring summit. He had the walls repaired, planted the surrounding slopes with forest and turned the castle into a picturesque ruin to be admired from his palace and walked by his guests. What you see now is that romantic restoration on medieval foundations. The battlements run for hundreds of metres along two rocky high points, with towers, gateways and long flights of stone steps between them, and every turn opens a new view: Pena's red and yellow towers on the next hill, the town and the National Palace's white chimneys far below, the plain stretching towards the sea, and on clear days the Atlantic coast and the distant outline of Lisbon. Inside the walls are the remains of a medieval chapel, an excavated area with storage silos and a small interpretation space about the castle's Islamic and Christian past. It is managed by Parques de Sintra. Expect exposure: the walls are steep, uneven and windy, with low parapets in places, and there is little shade in summer.

Why it is worth the climb: Sintra's palaces are about interiors and gardens, but the Moorish Castle is about the landscape itself. Standing on the Royal Tower, the highest point of the walls, you understand why every power that held Lisbon wanted this ridge: it commands the whole western approach. It is also the best place to photograph Pena Palace, which looks like a toy castle perched on the summit opposite. Archaeological work within the walls has uncovered traces of the medieval settlement, and the interpretation area gives useful context about the Islamic period in Portugal, which is otherwise easy to overlook in a city so focused on the Age of Discoveries.

Working the visit: the castle sits between the town and Pena, a steep climb above the historic centre. Fit walkers can hike up the forest path from the town in roughly half an hour; most people take the circular tourist bus from the station and the town centre that serves the hill monuments, or a taxi or tuk-tuk. Once inside, walk the full circuit of the walls, but take your time on the steps, which are high and irregular. Allow an hour to an hour and a half. Bring water, a hat and a layer: the ridge can be hot in summer sun and cold in the Atlantic wind the rest of the year, and fog can roll in suddenly, which is atmospheric but hides the views.

Planning around it: the castle pairs naturally with Pena Palace, a short walk further up the hill, and many visitors buy them together. If you have a timed Pena slot, do the castle before or after depending on when it falls. Parques de Sintra closes the hill monuments for safety on days of severe weather or extreme fire risk, so check the official notices before travelling on a stormy or very hot day. Not suitable for people who struggle with steps or heights; families with confident older children will love it, but keep toddlers close.