Street World

Imagine the potential of a world consisting of only one street. This street continues around the entire equator of the world, allowing one to walk down it for an eternity without finding a turning. It is a continuity of shops, terraced, with apartments above. There are what amounts to districts on the street, varying increasingly the further one travels along. Go far enough and you will find people that speak different languages and have different shops.
Behind each of these shops lies the infrastructure that allows its goods to be produced, the local supplier immediately behind, followed by a series of factories producing each of the goods, followed by specialist producers of goods and machinery for each of these factories, all the way back, hundreds of miles (either to the North or South, depending on which side of the street one started at) to the land and seas, quarries and mines where materials originate, to be passed forth through this streamlined system back out to the street. Beyond this there is only rock and ice.