Well, when you put it that way...
As a result of these moon landings, our continued use of robotic probes and telescopes, and general scientific prowess there's this impression out there that we have "explored the moon." I mean, hell, we sent missions to it and all, what more could you want?
Well, as it happens, a lot, because as I said before the Earth's moon is effectively a planetary body. Its average radius, at 1,737.1 kilometers is 71% of the planet Mercury's radius of 2439.7 kilometers. It's mass is about 22% of Mercury's and about 1% of the Earth's* so, basically, we're talking about a very large body that is fairly close to our own world. As such it would be a little cocky to think that we had explored the whole thing. But still, we've been at this for a while, so we've explored a lot of it, right?
Eh. Not so much. Recently, NASA put together a pair of maps that give an idea of just how much of the moon we explored with Apollo 11. And for comparison, these maps are superimposed over a soccer field and a baseball field. Check it out:
Kinda humbling, no?
* Keep in mind that radius and mass don't change linearly in relation to each other. As there is more mass, there is more gravity, which tends to compact material to a greater degree. It's also well understood that the moon is relatively poor in dense heavy elements compared to the Earth and, so, has a lot of volume for its mass.