C1856 Illusory and Real Palaces

"How depressing. We have seen these sand dunes and broken rocks more than ten minutes ago. Why did they appear again?"

"We were clearly flying in a straight line. Could it be that we have unknowingly turned into a circular route?"

If an ordinary explorer entered the desert, it would not be strange for such a thing to happen.

Because their speed was slow, and their vision was limited