Depends on where you are (location wise). These cities are amazing to visit (in no particular order)

If you live in East Coast
New York
Washington D.C.
Boston
Philadelphia

If you live in South:
New Orleans
Atlanta
Orlando
Miami
Austin
Houston
Dallas

Mid-West
Chicago
Minneapolis
Denver

Southwest
Las Vegas
Albuquerque

West Coast
Seattle
San Francisco
Los Angeles
Portland

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Oops--forgot it was states you were asking for. Oh well