Here is a link to some of the finest viewpoints in Lisbon.

Lisbon Scenic Viewpoints

S. Pedro de Alcantâra viewpoint was recently reopen to public. From here you can beheld one of the pretiest views over downtown overlooking S. Jorge Castle. Do not miss this viewpoint that you can reach from the bottom of AVenida da Liberdade by taking the lift Glória or just walking up the street of this lift.