Some worthwhile touristy things are Pena Palace (in Sintra) and Sao Jorge Castle; take Tram 28 for a city tour.
Museu Berardo - top-notch contemporary art museum. Nearby is Pasteis de Belem, with its beloved custard tarts.
Carmo Convent is near Chiado and worth a quick visit - a church that lost its roof (topless church?) in an earthquake long ago.
Estufa Fria is an indoor botanical garden and a nice escape.
Cemiterio dos Prazeres (cemetery) - mausoleums galore, photo ops for Joy Division bootlegs LPs, if that's your thing (you can board Tram 28 on a nearby stop from here).
The food situation there is amazing (but do a little research), if your family is into that.
― ernestp, Thursday, 20 January 2022 02:24 (two years ago) link