Spiral TRAIN Tunnels Yoho National Park
Channel: AGP Travel Planning
Date: 2016-07-20

In Yoho National Park the Canadian Pacific Railway uses two spiral tunnels to tackle to steep mountains, built starting in 1907 and completed in 1909 these tunnels are still in use today.

It is an amazing feat of engineering as the tunnels were constructed with rudimentary tools and dangerous nitro-glycerine explosives and were only 5cm off from center. They were built to bypass "the Big Hill" which was notoriously steep and difficult for trains to get up and down, many trains derailed.

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