http://earthengine.google.org/#intro/LasVegas
Actually pretty cool, you can move over to Tulsa and see things like Skiatook Lake forming, roads being built into Bixby and more...pause it while your moving the map..zoom in and out...what are some cool things you find?
Awesome stuff.
Someone else posted this a couple of weeks ago. The re-visit to the site was pretty cool as I forgot, until zstyles said something about Skiatook Lake, that it was dammed in in the early 1980's. You can see it fill up from 1985 on.