Since the holiday movie takes place mostly in a Christmas-friendly snow-capped locale ... that a majority of The Merry Gentlemen was shot right in sunny Santa Clarita, California.

On Monday, Mariah Carey announced her Merry Christmas One and All! tour — a 13-date run will kick off on Nov. 15 in Highland, California, along with Los Angeles, Montreal, Chicago and more.

Buena Park, California is home to Knott’s ... of lights twinkle as they turn on for the season. Christmas in Calico continues as the Snow and Glow experience fills the buildings and paths ...