The Lost City of Atlantis. Tucked away, in a far removed corner of the ocean lies Atlantis. Long gone are the evil rulers who brought about the destruction of this great civilization. There is a new ruler who seems to have everything under control. One might say the place is looking down right happy. Just don't mention sushi to any of the locals.
The idea for the seabed came from Soren's fabulous Atlantis MOC that was at Brickcon recently. You can see his work here. www.flickr.com/photos/32865345@N02/6478779507/in/photostream
I should also mention that the mermaid sculptures were from a design I saw at Legoland a few years back.
And finally it should be apparent that there are a few design elements that were inspired by browsing through Katie Walker's photostream, which you can find here.
Be sure to check out the video as there is lots of animation!
Also, you can see it in person, as it will be at the Surrey, B.C. museum for the Vancouver Lego Club's Mythology show from July 2012 through to September 15th.