In my opinion Lisbon is right up there with London, Paris, Rome and Barcelona in terms of allround amazing European cities. It's got a rich history, gorgeous architecture, a great vibe, lots of cool sights to see, very good weather and very kind inhabitants. I was there for 2 full days and only by strolling and cycling around and doing touristy stuff from dawn till dusk did I feel like I was able to scrape the surface of all this amazing city has to offer! The highlight was definitely the Castelo de Sao Jorge, including its absolutely incredible views over the city, equated only by de Santuario de Cristo Rei on the other side of the Tejo. Riding tram 28 feels like stepping back in time, looking through cannon holes on the Torre de Belem you imagine yourself a defender of old, and walking in the Mosteiro de Jeronimos you can't help but be amazed at the architecture. Experience the grandeur of Terreiro do Paço and climb the stairs to Largo do Carmo. Lisbon really is a must-see city!