Grassi Lakes has two emerald tarns caught in a fold of Canada's Rocky Mountains above the resort town of Canmore, Alberta.
The lakes were named for Lawrence Grassi, a climbing guide and trail builder who constructed a lovely path to the base of the crag in the 1920s, where local climbers still come to hone their skills.
The photos in this synth were taken by one of the world's top mountaineering photographers, Pat Morrow.
Pat's photographic career took off when he scaled Mount Everest in 1982 as the photographer for Canada's first and widely publicized expedition to that mountain.