Most folks do not know it, but the UN actually has FOUR headquarters around the globe: 1) New York, USA; 2) Geneva, Switzerland; 3) Nairobi, Kenya; and 4) Brussels, Belgium. I say we give the UN an ultimatum to get out of the USA in 6 months and decamp to one of their three other headquarter. America dumps its membership in the UN and cuts them off from all US dues. The UN headquarters is then bulldozed and given to the City of New York.
I vote for Narobi
Unfortunately for those of us who would like to drive the UN out of our country, the land it occupies was donated to the UN by John D. Rockefeller, Jr. The land the UN occupies technically does not belong to the United States, but to the United Nations. The complex is technically extraterritorial by treaty. However, we pay somewhere near a third of the UN's budget, so if there is a way we can legally discontinue our "assessment," then maybe the parasites will leave of their own accord.
Turn it into Trump Tower - Turtle Bay.