I have the vaulted walls and the extras for the Atlantis. Im considering redoing that building I have in the middle of the area. I also had to move the two slides apart to make took for the splitting coaster.

Atlantis themeing is one of the only thenes I use in-game scenery for. For example, the "Ruined Arm" represents Neptune's Trident.

I have the vaulted walls and the extras for the Atlantis. .....

Yes, in addition to the Atlantis Vaulting CS set you already have there's another one out there called Atlantis Extras; another great set that, seemingly, contains an endless array of pieces - great stuff that!

There's a third set I don't even remember the name of, I'm sure it's Atlantis something. It's only got about four pieces in it and I think when I get around to the mammoth task of streamlining my Themed folder it will be among the first to go.