LRO Reveals the Crystal Towers of the Moon

I was shown just the image by a friend and asked what I thought I was looking at. My first 3 thoughts - crystals, natural, fractals. I thought it was an image of some sort of crystals under a microscope, horizontal, but with closer inspection I saw dimensions caused by light and shadow. At that point I could see nothing else but a crystal fortress. I was then told it was an image of the moon and shown this page. Simply amazing.