Instagram Accounts for US History

I just started using Instagram for my class this year and, so far, it's been a big hit.  I've actually had more success with it than I have with Twitter.  Middle school kids are much more into Instagram than Twitter. Two accounts I follow are "Today In American Histosry" and "American History Musuem".  Both do a great job of posting interesting historical photos as well as "this day in history" photos that I can reshare.  

I have also taught history classes. I am going to check out your suggestions.