We barely explore the place at all, really - the Map Room we find ... Furthermore, the long Wrathion quest chain makes it clear that there was a lot going on in Uldaman - the Eye of the Watchers ...

These strongholds were scattered all over the world -- Uldaman, Ulduar, and Uldum. Ulduar was the home of the most important Watchers, and it was here where the failsafe was brought into play.