Limsa Lominsa in the Final Fantasy XIV beta. But if you've done the sea serpent tango more than once, Ul'dah and Gridania are no doubt sounding pretty good. So it's a good thing that MMOSite is reporting that the next phase of beta will start in September and will include the two heretofore unseen cities as playable areas. Considering the recent hands-on experience with the starter cities, we think it's well within the realm of possibility.
Of course, one of the major components to making each of the starting cities and subsequent areas stand out is the worldbuilding efforts of the development team. The most recent Making of Eorzea documentary covers precisely this, and not coincidentally, it can be viewed past the cut. With a discussion of the scenery and the visual culture of the game's landscape, the video is something every Final Fantasy XIV player can enjoy, and it shows that the vibrancy of the world has been a big priority during development.