This photo shows the bird and wildlife observation blind at the end of the Cave and Basin Marsh boardwalk trail which originates on the lower side of the Cave and Basin National Historic Site in Banff National Park. The trail extends about 100 yards/meters out into the marsh. This area is only about a kilometer from downtown Banff and is well worth seeing both for the views of the surrounding mountains and for the natural history of the marsh.
To reach the Cave and Basin area, drive south through downtown Banff, cross the Bow River bridge, and turn right on Cave Avenue. This site is 'Point of Interest Number 2' on this excellent Parks Canada map. Take time to visit the Cave and Basin historic area, and follow the signage down the hill to the marsh. There is also a nice hiking trail around the entire marsh area.