[Wyman]

Just did a 30 day roadtrip of the US (May-June). Tons and tons of driving, but it was a blast.

Michigan (start)
Pittsburgh (family)
Week in North Carolina (family/beach vacation)
Nashville (college roommate is there now)
Asheville (quick stop)
Tulsa (family)
San Antonio (Alamo & Riverwalk)
Carlsbad Caverns
White Sands, NM
Painted Desert & Petrified Forest
Grand Canyon for a couple days
Vegas for 5 days
Sequoia NP
Yosemite NP
San Francisco
Yellowstone NP
Mt Rushmore
Badlands
Minneapolis
Duluth
thru Michigan's U.P. into Canada
Toronto
Niagara Falls
back to Pittsburgh to pick up some stuff
on to NJ for the summer.

Some of the choices were for family/friends reasons, obv.

What I'd recommend for sure:
Carlsbad Caverns
Grand Canyon (must must must see & really should hike)
Vegas
Yosemite NP
Yellowstone NP

Edit: For your first time to the US, you have to see New York, imo. The east and west coasts are like 2 separate worlds, and having grown up on the east coast, our trip focused heavily on things "out west" that we'd never seen and ignored many beautiful/interesting places back east.