Significance of White-ish Area on Top of Building

What’s the significance of the white-ish area on the top of this building? I’ve seen it on a couple of maps but I’m not sure what it represents. I’ve actually moved to one of these locations but didn’t see anything happen. Thanks! :slightly_smiling_face:

I wonder why people don’t search forum for answers. They create topics, upload screenshots, and write long questions…

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Awesome! Thanks for replying :smiley: