Innovations in Nigerian Spam

I'm a big believer in the United Nations, international law, and other efforts to institutional global cooperation. Today I learn that it's finally paying off:

United Nations Development Programme

United Nations House

Plot 617/618, Diplomatic Zone,

Central Area District, Garki,

Abuja, Nigeria.

Compensation Ref Number: UN277360NG

This is to officially notify you that you have been selected as one of the few beneficiary of 2010 United Nations 65th anniversary Compensation by random Email Search System(ESS). Your email id was lucky to be picked among the ten thousand emails that was selected worldwide by UN, you have been compensated with $200,000.00USD by United Nations as a sign to help the less privilege worldwide. to enmark the suecessful United Nations 65th Anniversary Celebration we have decided to give ten thousand people around the world compensation funds as a sign of reducing the global economy and financial meltdown around the world.

I just wonder why they give this thing an Abuja address? Seems like a total giveaway. Why not pretend to be in Geneva, a city renowned for its international institutions and shady banks?