Spiral Tunnels - Canadian Pacific Railway - British Columbia - Postcard SP23

This vintage postcard features a striking historical photograph of the Spiral Tunnels on the Canadian Pacific Railway, showcasing the engineering marvel that allowed trains to navigate the steep grades of the Rocky Mountains in British Columbia.

Scene Details:

• Dramatic aerial view of the winding railway line through a forested mountain valley
• White dotted lines marking the route of the Canadian Pacific trains through the Spiral Tunnels
• Dense evergreen forests covering the mountainsides
• Detailed text panel on the left describing the tunnel construction and engineering specifications
• Caption reads "White dotted lines represent the route followed by Canadian Pacific trains in passing through the tunnels"
• Black and white photograph with excellent detail and contrast

The back includes comprehensive technical information about the Spiral Tunnels construction, explaining how the grade was reduced from 4.5% to 2.2% through the innovative tunnel design under Cathedral Mountain and Mount Ogden.

Made in Canada
Divided back, unposted

Please zoom into and look closely at the front and back photos to view condition, and feel free to send me a message if you have any questions. Thank you, D