As a late entry to the "Top 10" PotW, I mapped using the high res USGS imagery of VA to start mapping Busch Gardens Williamsburg. Mainly I cleaned up the entry roads a little and the main parking lots, but the amusement park tram, a few of the water rides and the roller coasters have been added. Let me know if you're interested in helping to complete the map.
http://www.openstreetmap.org/?lat=37.233&lon=-76.64247&zoom=17&layers=M