In your case it doesn't sound like a MAT is the right call. As a previous poster said, it's mostly a transition degree for non-certified people.
If you think you might want to move into k-12 administration at some point (vice principal, principal, etc.) get a masters in educational leadership, as Econteacher said. Make sure it meets the requirements of your state to hold an administrative position.
If you want to open the option to pick up an adjunct position at the local community college in the summer or night courses a masters in content is the way to go. If you are VERY lucky you may be able to get a full time position at a community college but those are very rare. This is also a good option if you really enjoy a topic and want to explore it. You mentioned history, do you really like history? If so a master in history (or any other topic you enjoy) would typically get you a pay raise at most public k-12 schools. Some high end private schools will not consider any candidates without a master in CONTENT but there aren't many schools of this caliber. Teachers with a masters in content are extremely rare in my experience but that may be a regional issue. I don't know how social studies fields are but most graduate students in math get teaching assistant-ships, it pays for your school and you get some college teaching experience at the same time. These opportunists are very rare for teaching degrees, which is a bit ironic.
I can't really recommend the masters in curriculum unless you have some experience. I don't have personal experience with these degrees however, I know many people that have gone that route and they're pretty blunt when they talk about it. They claim it exist as an easy way to get the pay raise for a masters, designed specifically to be cheap and easy as Dracos implied in their last paragraph. If that's what you really want, maybe try out teaching first to see how you like it. It has no value outside of k-12.
If you're seriously considering a masters in special ed, please understand this the hardest job in the whole system. It is not just hard to manage the students, it is absolutely emotionally devastating more often than anyone wants to admit. If you're not totally committed to this path, then give it time and see how things go first.