Imagine a giant library housing a collection of images and artifacts from all of the Living Story updates, that way new characters/players can see a bit of what they missed and how the world has changed. Like a HoM but for everyone.
Also a gallery of legendary weapons would be sweet, and cool to look at/motivate people like me slowly saving to craft theirs /sigh
Either in LA, replacing LA should it be destroyed or placed elsewhere at a neutral point in the world for all to enjoy.