it's an interesting question. yes... and ... no.
initially, the american adventure was actually going to be in the front of the lagoon. that would have made it between mexico and canada (got it?). ultimately it was decided that it might be deemed too imperialistic, it would have had a futuristic look to it to transition it from future world (so they wouldn't have had the georgian look it has now) and it would have blocked the lagoon. so they moved it to the back.