Espoo has more than 90 ice rinks.
Freezing one middle-sized ice rink requires about 120 cubic metres of water when freezing begins from zero. Under optimal conditions, freezing a rink takes almost a week. Conditions are ideal when the temperature is 5 to 10 degrees Celsius below zero. If the temperature is too low, more than 20 degrees Celsius below zero, the ice begins to crack. The ice rink ...