Hint: The answer is not that these are part of a movie set.
Folks who live or have been to ski areas might recognize these as snow cannons or snow guns. They make snow when Mother Nature needs help. Water and pressurized air are forced through the guns through freezing air and the water freezes into hexagonal crystals or snowflakes.
We saw this collection last year in Killington, VT, a popular New England ski area.
Ski resorts use the cannons to extend their ski season by supplementing natural snowfall. Indoor slopes with a climate-controlled environment use them more often. There are significant costs associated with artificial snow production. It's an expensive process especially in terms of energy use and associated costs.
Some snow gun info: Invention of the snow gun dates to 1950 and is credited to three men in Milford, CT. In 1952, Grossinger's Catskill Resort Hotel in NY state was the first resort worldwide to use artificial snow. Snow-making began to be used extensively in the early 1970s. Artificial snow was used extensively at the 2014 and 2018 Winter Olympics.
Enjoy Your weekend, Everyone
(There's no snow in our NH forecast.)