A President for a neighbour
The Palacio de Belém is the presidential residence. If you can’t get an invite then pay a visit to the Jardín de Ultramar or the Palacio Nacional de Ajuda that’s been turned into a museum.
Take a walk along the waterfront to the Descubridores Monument or the Belém Tower. Or for a religious experience, visit the Monasterio de Jerónimos.