My favourite experience in Lisbon (other than all the amazing food experiences) was seeing the view of the city from Miradouro das Portas do Sol.
It’s a viewpoint/observatory where you can get a beautiful view of the city. You know that picture that everyone takes in Lisbon with the red roofs and the ocean in the background? This is the place :)
To get here, you take the tram 28 and get off at Largo das Portas do sol.
There are bus routes that take you here too (for the best route from your starting point, just search on google maps).
Here are some of the photos I took at Miradouro das Portas do Sol: