Lisbon is a vibrant city, very beautiful and full of amazing buildings; you can get a sense of how devastated it was after the 1755 earthquake; some buildings are still crooked or are roofless! Don't miss the Tower of Belem and the metal Elevator; the Praza do Comércio is very nice too, historically interesting because it was there where in 1908 two Republican thugs shot and killed king Carlos I and the Crown Prince Luis Filipe; the Portuguese monarchy was overthrown two years later. (Just thought you'd need to know these things LOL)