Towering dramatically above Lisbon, the mid-11th-century hilltop fortifications of Castelo de São Jorge sneak into almost every snapshot. Roam its snaking ramparts and pine-shaded courtyards for superlative views over the city’s red rooftops to the river. Three guided tours daily (Portuguese, English and Spanish) at 1pm and 5pm are included in the admission price.

These smooth cobbles have seen it all – Visigoths in the 5th century, Moors in the 9th century, Christians in the 12th century, royals from the 14th to 16th centuries, and convicts in every century.

Inside the Ulysses Tower, a camera obscura offers a unique 360-degree angle on Lisbon, with demos every 20 minutes. There are also a few galleries displaying relics from past centuries, including traces of the Moorish neighbourhood dating from the 11th century at the Archaeological Site. But the standout attraction is the view – as well as the anachronous feeling of stepping back in time amid fortified courtyards and towering walls. There are a few cafes and restaurants to while away time in as well.

Bus 737 from Sé or Praça da Figueira goes right to the gate. Tram 28 also passes nearby. An escalator traversing the hill from Praça Martim Moniz is planned to be in operation by 2017.