Obsession? Probably.
Selkirk Yard: https://www.multimodalways.org/docs/railroads/companies/CR/CR%20Yards/CR%20Selkirk%20Yard%20Visitors%20Guide.pdf
Elkhart Yard: https://www.multimodalways.org/docs/railroads/companies/CR/CR%20Yards/CR%20Elkhart%20Yard%20Visitors%20Guide.pdf
Follow me on Twitter and regret it: https://x.com/CobraMerciless