Starting at the Cologne Cathedral and ending at the Aachen Cathedral, this route follows part of the Camino de Santiago, also known as the Way of St. James (Jakobsweg in German), specifically the North Rhine route. 

Die nordrheinischen Jakobswege wurden von der Deutschen St. Jakobus-Gesellschaft (DSJG) zusammen mit dem Landschaftsverband Rheinland (LVR) erschlossen, gekennzeichnet und dokumentiert.

https://www.jakobswege-europa.de/wege/nordrhein.htm

The Cardinal Greenway is a scenic, multi-use recreational trail spanning approximately 77 miles, including dedicated trail segments and a road portion. The route stretches from Sweetser to Richmond in eastern Indiana, following the path of the former Chesapeake and Ohio Railway for much of its length. This diverse trail offers a mix of urban, rural, and natural environments.