If you dream of the tower, then such dream indicates the high expectations you have set for yourself. To be on the top of the tower, means that you already achieved what you were aiming for. If you looked at the tower from the above, then it shows that you set the right target to achieve the success. If the tower was set up in the water, then it signifies your hidden feelings. Probably you feel a very strong affection to a certain person, therefore you are willing to reach that love. If you tried to climb into the tower, then it symbolizes the hard work you will have to go through while you will achieve what you were looking for.
Read more about dreaming of Tower in other dream meanings interpretations.