Cloud City & Prisoner Rescue adventures?

[Oryan77]

Are there any published adventures (any D&D edition) that consists of players visiting a city atop a cloud? I'm more curious than anything to see how it's incorporated into an adventure.

Also, can anyone suggest some good published adventures (any D&D edition) that involved players sneaking into a large prison to rescue an NPC being held captive? If it helps, I'm interested in running something like that on the Outer Plane Carceri.

Thanks for any help.

 

[VirgilCaine]

I don't think any of the free adventures from the WotC site involve that, but those sure sound like good ideas for adventures, though.

 

[Oryan77]

Nothing from any old school players? I assumed this stuff would've been more common in the older editions.