The Newark Museum in Newark, New Jersey is possibly the most under-rated museum ever. It has a fabulous collection and is just a short train ride from Manhattan, but people almost never talk about it. I think this is really unfortunate.
The Montclair Art Museum (MAM) is a small museum focused on American art. It has a lovely atmosphere, and I visit at least once a year. Learn why I enjoy it in and what I saw on my most recent visit.