Description
YOHO NATIONAL PARK, B.C., Spiral Tunnels, Field, B.C., C. Postcard. These tunnels are located just east of Field, B.C., and are world-famous for their engineering feat. MAKE AN OFFER. THE MORE YOU BUY THE BETTER DEAL I WILL ACCEPT The postcard features a view of the Spiral Tunnels in Yoho National Park, British Columbia. These tunnels are located just east of Field, B.C., and are world-famous for their engineering feat. The Spiral Tunnels were built to help the railroad descend a steep incline, allowing the train to cover a vertical distance of 105.