Arkansas (sister used to live there)
Kentucky (vacation)
Missouri (sister lives there)
New York (driving to Niagara Falls)
Ohio (Born and raised!!)
Pennsylvania (uncle owns 150 acres)
Tennessee (honeymoon in the Smokey Mtns.)
West Virginia (white water rafting)
Niagara Falls (3 or 4 times)

Those I remember. But when I was 2 or 3 my family drove out west for two weeks. So I've been to South Dakota, etc but don't remember anything!

I've driven from Missouri to Ohio, so I'm sure there are a few others I've be to... but didn't stop at.