New York City
Washington, DC
Boca Raton, FL and/or South Beach Miami, FL
Orlando, FL if you are interested in Disney World
Stowe, VT to meet the Von Trapps and here their real story of escaping Austria, and go to the Ben and Jerry’s original ice cream factory and tour. Then cross over by ferry to upstate NY into the Adirondack mountains.
If you like to gamble Las Vegas might be your thing. Kind of a bazaar place worth seeing once, especially since it is in movies all of the time, and you can see a bunch of shows. Go to the Hoover Damn while there, and if you are into geology and nature Valley of Fire is interesting, and of course the Grand Canyon is not far from there.
If you are into wine, consider the wine country north of San Francisco, California, and a few days in San Fran maybe.
Great Lakes are nice for boating. Holland, Michigan has a tulip festival in April, and then a less than two hour drive over to Chicago if that interests you.
Maybe Colorado, Rocky Mountains? I am not very familiar with thay part of the country, I am sure it must be beautiful.