If you wish to express your feeling to Vornado personally, and tell them how you feel about the "15 Penn Plaza" office tower (that no one wants). Feel free to email the President of the New York Office.
David R. Greenbaum (firstname.lastname@example.org), or if you prefer to go straight to the top and ask the boss himself, contact Steve Roth (email@example.com).
If you would like to send him a letter via snail mail, or perhaps some other gift you can do so by sending it to this address:
Vornado Realty Trust
888 7th Avenue
New York, NY 10106-4498
Be sure to put it to the attention of whomever you are sending it too so we make sure the parcels get to the correct location.