23 - and im still pondering whats wrong with the inclusion of SF. I lived in that area most my life, and while DC maybe should be included because of the Capitol, SF has plenty of history and breathtaking sites there as well. From Chinatown to Golden Gate Park, the Japanese tea gardens, the mission district, Haight-Ashbury, and of course the Castro (hell there is still so much more), I dont think DC holds a candle to that great city.
Hell New York doesnt either, and I live here now. But there is nothing like the NYC skyline that I see out my window every night.
just my $.02