Which schools offer a critica care nursing specialization?

I am thinking that it would be nice to get a masters degree in nursing, so I am looking into my options. I know that you have to choose some sort of specialty for these degrees, so I was wondering if anyone could tell me which schools offer a critical care nursing specialty, since I would really like to get into this specialization. I am hoping that there is an online option or a university that is located near me offering this specialization, otherwise I will have to choose something else I suppose since I can’t move right now due to my husband’s job.