This image shows a view of the botanical gardens in the city of Montreal, Quebec, Canada.

The description is in French and English, as required by Quebec law. First the French:
Le parterre des plantes vivaces
JARDIN BOTANNIQUE
Parc municipal, le Jardin botanique possède une collection de 10,000 variétés des plantes de nombreux jardins, d’excellents services d’enseignement et de renseignements qui lui entaillé un place enviable de par le monde.
And now in English:
The Parterres
THE BOTANICAL GARDEN
Montréal, Qué.
Part of the Park System, the Botanical Garden has a collection of 10,000 varieties of plants displayed in numerous gardens and is an internationally recognized source of botanical information and research.
–This postcard was used and is dated 28 June 1962.

This image shows the iconic Royal Canadian Mounted Police on their mounts in formation practice.

The description states simply:
The famed Royal Canadian Mounted Police drilling for the colorful Musical Ride.
–The Ride is performed world-wide since its beginnings in 1887.
This card was used and is dated 26 August 1965.

This image shows a pair canoeing on Lake Louise, Alberta in the shadow of Victoria Glacier, which provides most of the water for the lake from glacial runoff.

The description states:
Lake Louise and Victoria Glacier
Banff National Park, Canadian Rockies
–While the glacier seems quite close, there is a considerable distance of flat, dry land between the lake and the foot of the mountain behind.
This card was used and is dated 16 July 1963.
 

This image shows a portion of Lake Louise and the glaciated mountains that surround it and provide the water. It is located in Alberta Province on the border with British Columbia.

The description states:
SUNRISE ON LAKE LOUISE
Banff National Park
The Canadian Rockies
–The postcard was used and is dated 24 July 1967