It’s possible to see some of the Lisbon churches as Santa Engrácia’s dome (more known as National Pantheon), Santo Estevão’s Church and two white towers of São Miguel’s Church. Check Alfama labyrinth, one of the most typical neighborhoods.
There is also a bit of history in two tile panels, one from Praça do Comércio (before the earthquake that hit Lisbon in 1755) and other with Christians attacking São Jorge Castle. You can have a meal in the restaurant, it has a terrace or buy a painting, usually with trams as theme.
Buy some lupines beans (tremoços – I usually eat the peel) in a local shop, buy a beer and sit here in a stone bench enjoying the views.