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CPR main line near Yoho, B.C.
CPR main line near Yoho, B.C.
Cathedral Mountain from tunnel
Cathedral Mountain from tunnel
The spiral tunnel near Field, B.C., with Mt. Stephen
The spiral tunnel near Field, B.C., with Mt. Stephen
General view of new grade reduction loops and spiral tunnels, Field, Canadian Rockies
General view of new grade reduction loops and spiral tunnels, Field, Canadian Rockies
Spiral Tunnels
Spiral Tunnels