Hildórien

After the Awakening of Men, Hildórien is not subsequently mentioned, and it may be that it was lost in the mists of time, like the Elves' place of awakening at Cuiviénen. On the other hand, Men awoke much more recently than the Elves, and unlike Cuiviénen, Hildórien is never explicitly said to have been lost. At least in principle, then, it's possible that the ancestral lands of Men were still inhabited by them until the time of the War of the Ring and even beyond.