#1921: The Moon and the Great Wall
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[Megan is holding her arm up towards Ponytail as they stand atop a large brick wall with merlons along the top. They are standing to the left of a tower with three small windows as well as merlons on the top.]
Megan: Did you know that the moon's craters and plains are the only structures on the surface of a celestial body that can be seen with the naked eye from the Great Wall of China?
(Sourced from explainxkcd.com)
Title text:And arguably sunspots, on rare occasions. But even if they count, it takes ideal conditions and you might hurt your eyes.