He's done a much better job than I ever could. There are clear-cut lava flow features on the Moon, though they are not very abundant. This is probably because the flows are not very thick and meteorite impacts during the past 3 billion years or more have erased the boundaries between lava flows. The samples returned by the Apollo missions to the lunar maria are contain numerous samples of basalt, or solidified lava. The interior of the Moon appears to be dry as a bone, so there is no chance that it could have supported life.
Related features are sinuous rilles, which resemble rivers, but are actually drained lava channels.
So, once again, no evidence for water. These craters excavate the interior, allowing us to learn about the rocks at depth in the Moon. In all cases studied by either remote sensing or sample returns by Apollo, there was no evidence for the presence of water or other compounds needed for life to develop. In short, the Moon is bone dry and lifeless, and it always has been.