In this Saturday, Jan. 26, 2019 photo, a couple heads towards an entrance to a cavern at Ice Castles in North Woodstock, N.H. A team starts building massive walls in December to create a spectacular winter experience. (AP Photo/Robert F. Bukaty)
In this Saturday, Jan. 26, 2019 photo, a couple heads towards an entrance to a cavern at Ice Castles in North Woodstock, N.H. A team starts building massive walls in December to create a spectacular winter experience. (AP Photo/Robert F. Bukaty) Credit: Robert F. Bukaty

NORTH WOODSTOCK, N.H. — On a clear, frigid night in a courtyard made of walls of ice, Bruce McCafferty and his young son stand mesmerized, bathed in the pulsating rainbow light emanating from a series of stout ice formations.

McCafferty and his son Dougie have come out to Ice Castles in North Woodstock, N.H., a collection of ice tunnels, caverns and a 97-foot ice slide that cover an acre of farmland with a landscape seemingly out of the movie Frozen.

The winter wonderland, one of six in North America, is built from scratch when the cold conditions allow ice to be cultivated on the barren ground.

Other parks are located in Lake Geneva, Wis.; Excelsior, Minn.; Dillon, Colo.; Midway, Utah; and Edmonton, Alberta. This year, the attractions will stand until early March in most locations.

At the center of the New Hampshire attraction stand six ice structures that are nearly 4 feet tall and are lit from within by colored lights.

“It’s quite magical isn’t it?” McCafferty said. “It’s an amazing creation. I’d really like to know how they actually built it.”

The attraction starts small in December, when the site’s lead builder Matt Pasciuto and his team set up icicle farms: metal racks that are sprayed with water to allow icicles to grow on them overnight. The icicles are then harvested by “ice artists,” who place them around more than 70 sprinklers.

“Once we turn the sprinklers on, the water starts freezing to those icicles, making them grow together, bigger and bigger and thicker and thicker,” Pasciuto said. “We grow the castle about 2 to 3 feet at a time.”

Within a few weeks, the icicles have managed to cover the entire park, and some reach heights of 20 feet.

On a recent sunny day, the massive ice walls shined with a glacial blue hue. After the sun went down, the castles burst with colors from LED lights embedded in the ice, complemented by a synchronized fantasy soundtrack playing throughout the venue.

The attraction, which moved to this year from neighboring Lincoln, draws tens of thousands of visitors each season.

“When the movie Frozen came out, that was a huge boost because now everyone says, ‘Oh, we get to see an actual ice castle,’ ” Pasciuto said.

Three years ago, Adam Schellinger started bringing his girlfriend on annual dates to the Ice Castles in New Hampshire, a three-hour drive from their hometown of Brooklyn, Conn. On last year’s visit, Schellinger got down on one knee and popped the question. The crowd immediately began cheering. The couple was married in September.

“When I proposed, it was blue, and then it went to purple,” recalled Schellinger, who returned for a visit with his wife, Ashley, a couple weeks ago. “It was just awesome — a great backdrop for sure.”