While in Mandu, India, from the aerie of a 15th-century palace’s luxurious pavilion I could see a scene of daily life that I could have seen three-thousand or more years ago: a man directing an ox-drawn plough while his wife sowed the seeds. It seemed to me as if I was looking through a window into an ancient past. Traveling, in fact, is often a sort of time travel. You can see people living lives from the Neolithic period, or Bronze Age;  see timeless works of architecture of the ruins of ancient cities, or eternal landscapes unchanged for millennia.