My opinion? Forget the cities. Every US city (even the ones I adore) can't hold a candle to London.

See some of the *natural* beauty we've got over here instead. Yellowstone? Grand Canyon? Anyone have other suggestions?

San Fransciso isn't bad, though, as cities go. Definitely one of my favorite cities. And from there you could do Yosemite or Lake Tahoe.
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Tony Fabris