Having to spend 3 days in Lisbon?

Im visiting my boyfriend who is temporarily in Lisbon for business purposes and hell have to go on a three-day trip while Im there. Now, I dont know anybody there and he says that hell tell me where to go during those three days, but Id like to hear more suggestions. So, name everything you find interesting in Lisbon or in its near area. Thanks.

Lisbon is one of the most beautiful cities in Europe. You can feel its peculiar spirit the moment you touch the ground. If you thought that you wouldnt know what to do while youre alone you were wrong. The fact is that you wont have enough time to see all the attractions of Lisbon. Its located at the mouth of the river Tagus and its junction with the Atlantic Ocean. One of the citys attractions is Vasco da Gama Bridge over the Tagus. Youll be delighted to visit Colombo Shopping Mall which is considered to be the one of the biggest in that part of Europe. In the evening you can dine at one of the numerous panoramic restaurants overlooking the Atlantic Ocean. Dont forget to visit the monument to Christo Rei which is very similar to the statue of Christ in Rio de Janeiro.