National Geographic is a fantastic magazine. It'll be the last magazine published, when all other magazines have gone defunct.
In fact, I have every NG, ever. I have all the old ones on CD, special order from the mid-90s. I have all the NG's from the mid-90s to today on my bookshelf. My wife is now going back through them and reading old articles. The history articles are pretty good, and timeless, and while the science ones get a little dated, there's some very good info in there still.
If you don't have a subscription, I highly recommend getting one. It is well worth the money.