Base of the star outside having what the mankind can explore is done not have on the moon. Unless be to be in underground or similar place, do not have otherwise. The satellite has circled moon orbit to move, and circling moon orbit to move, make clear structure of the star outside existence without any evidence, perhaps do not have any structures at all actually (besides those structural) that the astronaut in Apollo task places before.
The dark side of the moon may occur. But a few scientists claim there is entry of a few burrows on spark. Hypothesis someone can say to also may have on the moon.
Travel when the mankind only in these two planets any, after getting affirming, we just can know it is hypothesis and guessed result only.