Endless Valinor ?

[Legate of Amon Lanc]

Welcome, r.j.c.! Well, as for the "endlessness" of Valinor, while I see what you mean and it will be nice (and I think quite appropriate), it seems clear that even here Valar are bound by the "boundaries of the realm of Arda", so to say. Or to use the Professor's words:

Originally Posted by Silmarillion; Of the Darkening of Valinor

Though all tides and seasons were at the will of the Valar, and in Valinor there was no winter of death, nonetheless they dwelt then in the Kingdom of Arda, and that was but a small realm in the halls of Eä, whose life is Time, which flows ever from the first note to the last chord of Eru.

Here it concerns mainly the time, but it tells us something about the "place" too. I would say, interestingly, one could probably make a map of Valinor if he wanted to. The reason why those who dwelt there didn't feel tired of it (as the knowledge of it was finite) was probably that the things there were unfading - somewhat like Lothlórien as described in FotR was (however that was only a mere reflection).