People,
Go to the link below and take a look. The whole page is interesting, of course. But scroll down to Chariots on the Moon and look at the "Wagon Wheels". I wonder if that dark space behind them couldn't be an entrance to the lunar underground.
Then scroll down to Temple on The Moon and look at the central arrow, on the right. That looks like a temple structure from South India.
Then look at the Evergreen Crater. They don't tell you where it is. But anyway, you get the idea.