The Navel {Found it!} at SE's Tokyo HQ
If anyone happens to visit the Artnia store/cafe at Square Enix's Tokyo headquarters, there is a small courtyard on the way from up from the subway station.
In the courtyard is a rather non-descript stone object...
http://img2.finalfantasyxiv.com/acci...97c63c2ee3.jpg
But on its nameplate I was surprised to read... The Navel.
http://img2.finalfantasyxiv.com/acci...3a567e2a4d.jpg
I wonder if this is what the game designers had in mind when they created the Titan fight?
http://img2.finalfantasyxiv.com/acci...afbfe6fc7f.jpg