How many parks does Six Flags NOT own?

After reading the news item about Six Flags not feeling that it was financially prudent to buy out their lease on Marine World from the city of Vallejo, CA, it got me to thinking this:

Are there any other parks (whether "flagged" or just a 6F property) operated by Six Flags that aren't actually owned by them?  Just wondering.

(Oh, and I know that they own the rides, just not the park itself... that's not the question.)

Thanks!

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"Reality" is the only word in the language which should always be used in quotes.

Enchanted Villiage
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My fellow Americans, let's roll!
I pray that I will never see a Six Flags Conneaut Lake

Would that be something like La Ronde?
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I am what I eat straight up earth.