1. The Spiral Tunnels in Banff National Park are a marvel of railway engineering. They were built in the early 1900s to allow trains to safely navigate the steep mountainsides of the Canadian Rockies. The tunnels take trains through a tight spiral, allowing them to gain or lose altitude as needed. There are two tunnels, one for eastbound trains and one for westbound trains, and they are visible from several viewpoints along the highway. The Spiral Tunnels are a popular attraction for train enthusiasts and tourists alike.

2. The Spiral Tunnels are accessible 24 hours a day. There is no admission fee or staffed entrance, and visitors are free to explore the viewpoints along the highway on their own. There is no phone number for the Spiral Tunnels specifically, but Banff National Park can be reached at 403-762-1550 for general information.

3. There is no ticket information for the Spiral Tunnels, as there is no admission fee. Visitors can drive to the viewpoints along the highway or take a guided tour by bus or train. The nearest transportation options are the town of Banff, which is approximately 30 minutes away by car, and Lake Louise, which is approximately 20 minutes away.