The development of the Canadian Pacific Railway is a cornerstone of Canadian History, and Field is a great place to explore the living legacy of this history. The Spiral Tunnels is a key location to witness this, where you see the rugged mountain terrain threatening westward expansion and how engineering innovation prevailed. A pair of loops were created by tunnelling deep into the valley walls, allowing the trains to scale mountains at a 2.2% grade.
From viewpoints on Yoho Valley Road and the Trans-Canada Highway, you can watch the 25- 30 daily passing trains and witness how this development still contributes to the connection of Canada.
Photo: Conrad Olson, flickr, CC BY-NC-SA 2.0