The first thing to know is that airport runways are named based on their magnetic headings. The second thing to know is that Earth's magnetic poles shift—and runway names must accommodate https://t.co/CYF1vkU70y
Peyto Lake in the CanadianRockies is blue, blue water, During the summer, significant amounts of glacial rock flour flow into the lake, and these suspended rock particles give the lake a bright, turquoise colour. Still clear, clear water.