Located just across the Missouri River in Kansas, Keystone is the sister city to the Missouri-based Central, with plenty of festivals linking the two. Previously known for its numerous slaughterhouses and its contribution to the livestock industry, Keystone has since become the home of the automotive and aerospace industries, serving as the central headquarters for a few highly influential cities. It has also become quite the shopping location, with vast warehouses formerly used as slaughterhouses being converted into sprawling centers of commerce. While the vast river make actual transport between the two cities difficult, there are numerous ferries and helicopter rides that will take you across, for a price.