Can I use my own pictures that I have taken for and resell them

Yes, the photos are yours and the common law copyrights to those photos belong to you once you take the photos, and you're free to make other works like jigsaw puzzles out of the photos. No one owns the images of those landmark buildings and skylines.

Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.

I suggest the you review the answers to similar questions previously posed:

http://www.avvo.com/legal-answers/can-i-put-famous-landmarks-and-quotes-on-t-shirts--12432.html
http://www.avvo.com/legal-answers/do-i-have-to-get-permission-from-the-owner-of-a-bu-24293.html