I believe one of the reasons I like Lisbon so much is because of its geographical similarity to Istanbul (my home city). Tagus River like Bosphorus, 25 de Abril Bridge like Bosphorus Bridge, Tram 28 like the nostalgic tram in Beyoglu and last but not least 7 hills these beautiful cities are built on.
Of course these hills offer splendid views of Lisbon. No matter in which neighbourhood you are it is for sure you’ll find a panoramic viewpoint (called Miradouro in Portuguese) near by. The good thing is that most of the miradouros have cafes where you can sit down and start day dreaming with a while contemplating the beautiful scenery.
I listed the ones I’ve been to myself. Let me know which one is your favourite.