I remember my first job in a real estate agency in 2000 - if you'd told me that one day we could hover over a map and see house sale prices and an automated valuation, I wouldn't have believed you.<p>Plenty of organisations, associations, and government departments publish great data in secret - sometimes just without the fanfare it warrants, and sometimes surreptitiously because they are required to even if they don't want to publish.<p>What are some of the meaningful or cool data sources you've used or uncovered in the past?
I think most people know about it, but I just learned about it recently: <a href="https://datasetsearch.research.google.com/" rel="nofollow">https://datasetsearch.research.google.com/</a>