[Iris Alantiel]

I would picture the old elven realms like Lorien and Rivendell as beginning to become overgrown with plants and trees as nature began to reclaim them. As time passed the buildings might begin to crumble (sort of like ancient ruins) but perhaps not, being Elvish. I would imagine the atmosphere around them to be sort of mystical and magical. If you were standing in the middle of, say, Rivendell, you would probably be able to feel a trace of the elvish folk who once lived there, underlying the land, although you might not even know what you were feeling unless you were familiar with the place's history.