From the USA, and, internationally, only Canada [Ontario and Quebeck] and Australia [Queensland]. However, within the USA:
Arizona
California
Connecticut
Florida
Georgia
Illinois
Louisianna
Maryland
Minnesota
New Mexico
New York
Ohio
Pennsylvania
Texas
These I've actually stayed for days/weeks in. In addition, have traveled through many more States, but not more than an overnight stay while en route to a particular destination.
For me, it's not a fear of going to another many other countries, just never have gotten around to making the time to do so.