"And I say unto you, if my people observe not this law, to keep it holy, and by this law sanctify the land of Zion unto me, that my statutes and my judgments may be kept thereon, that it may be most holy, behold, verily I say unto you, it shall not be a land of Zion unto you."
Doctrine and Covenants 119:6
This is interesting because that last part makes it dependent upon the people... which really makes a lot of sense. Just like the city of Enoch became what it was when the people were perfected, Zion doesn't have any holiness just because of the tract of land that it is on... "it shall not be a land of Zion unto you" ... but it could be a land of Zion unto anyone willing to do the things necessary to make it so. I like that emphasis on who rather than where... I think sometimes I daydream of the perfect place... maybe someplace to escape for an afternoon, or wonder what heaven will be like... but the fact is, that if I am the perfect person, then it doesn't matter where I am. We, as a community, build Zion not by learning brickmasonry or carpentry, but by perfecting ourselves, little by little, until wherever we are is Zion... merely because we are there. It takes effort... but not effort that is strange to us. We've been working on ourselves for a long time. :) And, for those particularly difficult habits, we have God and at least a few other people to help and support us. So, let's go build Zion. :)