It was glittery! There was a room called the "wedding chapel room" that looked like it was strewn with diamond dust. Valinor, anyone? ;)

There were three "wings" of it to explore, plus ithilwen used to live in Hershey and tells me that a section going in the direction of Hershey caved in before they could explore it. Methinks they should excavate and look for cute blond Elves named Felagund.... :^P