Ice, freezing and thawing makes a cracking sound due to expansion and contraction with rapid change in temperature. Some lakes, known to make a greater range of sounds, are often referred to as “singing lakes”. Try Googling the term. An interesting account of a lake singing recently appeared on the Hike.Bike.Travel web site. Check out the account of our own Kananaskis Country singing lake. Know of any other singing lakes in Kananaskis Country?