There was recently a proposal to send rovers to explore them: https://en.wikipedia.org/wiki/Moon_Diver_(spacecraft) https://en.wikipedia.org/wiki/Moon_Diver_(sp

There was recently a proposal to send rovers to explore them: https://en.wikipedia.org/wiki/Moon_Diver_(spacecraft) https://en.wikipedia.org/wiki/Moon_Diver_(spacecraft) Check out the video on this page for a ton of details: https://www.kiss.caltech.edu/lectures/2018_Moon_Diver.html https://www.kiss.caltech.edu/lectures/2018_Moon_Diver.html That particular mission concept was not funded, unfortunately, but I'm hopeful that we'll do something like this soon. As others in this thread have said, aside from just being really cool these lava tubes on the moon (and Mars! https://en.wikipedia.org/wiki/Martian_lava_tube https://en.wikipedia.org/wiki/Martian_lava_tube) are an interesting candidate for human habitats.