This is a very interesting structure that Streetcap1 of Youtube found. Its what I call a white ceramic...which is the color and gloss it has, the Image is Currently Photoshopped . I see these a lot on the moon, Mars, Mercury so I am familiar with them.
Image source: http://lroc.sese.asu.edu/posts/511
The structures often have irregular shapes, which tells us the structures have been created room by room, rather than creating one giant room then making smaller ones inside. Great discovery by Streetcap1. These structures need to be taken seriously and are not getting enough attention.
Watch Streetcap1 video below:
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