
@jwz We did this at Facebook when we first moved into the MPK campus. It's been replaced by solar panels but you can still see it from the old google satellite views. It was visible from planes getting ready to land at SFO.
When Mark Zuckerberg called for a "Space Hackathon" to decorate Facebook's massive new headquarters at 1 Hacker Way, he probably didn't expect employees to take him so literally. A few scurried up to the roof with some tar paint, and now there's a 42-foot wide QR code on the roof that's visible from space. Scanning it opens the new FB QR Code Page on Facebook which may host puzzles, jokes, and other flavor to humanize the company. For now you'll need an airplane or Facebook security badge to get a look at it first-hand, but once indexed it should appear on your favorite satellite mapping website.
signed up for my first in-person 5k race since 2019... really slow these days but this one's fun and a fast, flat course.