I always wondered if it was possible for a company to just buy up a bunch of land and develop it however they wanted. If I recall, Google wanted to purchase land north of the 101 in Mountain View and put a giant bubble over the entire thing [1].
Not that I particularly trust Google to do a great job, but interesting thought experiment nonetheless.
[1] - https://www.bizjournals.com/sanjose/news/2016/02/23/google-r...