The Merchant and the Alchemist's Gate

A short story set in Baghdad about a merchant's experience with a gateway that travels through time. There are shorter tales interwoven within the overall tale. The science is not really clearly explained, but the foci of the story is on the nature of the past and the future - and it does this quite effectively, focusing on the people, their motivations, and the lessons they away. The closing scene invokes an emotional response, a closure of sorts, very well done.