In the modern world it was Einstein, with his theory of relativity, who popularized Time Travel in the magazines and on TV, opening the doors so long closed, to its "real possibility" and igniting our imaginations.
Ancient worlds may have had the techniques and technology of time travel long ago, but few records of that exists except in collective memory mainly relegated to legend and myth––still too fantastic to be real.
Perhaps it is just plain comfortable to consider the third dimension to be the "real" world and relegate Time Travel to the subject of "science fiction." Comfortable is good. Comfortable like sitting in a soft armchair petting your cat instead of flying a rocket ship chased by energy gripping enemies. Yes, comfortable is good.
Yet, it's a fresh, new world of possibilities when we contemplate "string theory" or the "theory of everything" advanced mathematicians study. In these mathematical languages we exist in but one of eleven or twelve dimensions.
Again, science touches the divine. We are all waiting for the complete embrace.
If Time exists only because of our consideration of it, then we are able to move through time at will. What we consider to be "real" is real. If we all were in 11 different dimensions at once.... Well, I imagine this could make conversation kind of complex causing a need for inter-dimensional translators and whatnot. Because, of course, we are only communicating now because you and I both believe in the "reality" that matches the significances of each word I type. ;-)
It is as if we walk through a web of infinite potentialities that come in to being as they are chosen, only for the moments they are chosen to exist as reality. Which of course means that there is all time and no time at all times! And there is a constant choice, conscious or unconscious, to remain in this time.
As for me i am contemplating my conscious choice with a great deal of admiration. The fact can lay here, viewing some 10,000 separate colors at one time (or more) in the leaves of a single tree, while evening light makes shapes in shadows. That I can feel the floor beneath me and drink in the richness of today's blue sky. Yes, I believe I am staying in this time and place by choice.
Our Earth is a blessed place. We are Elven: beings of light and color, sound and vibration, song beyond words that matches the rhythm of the sun.