Yes, Virginia, there is such a thing as the world's largest snow globe. Good picture of it here.

It's in Bryant Park, one of my favorite parks when I lived in Manhattan. Bryant Park is unsurpassed for its quiet beauty. It's a haven for ice skaters every winter. I can't ice skate (never tried), but when I lived near the park, I used to spend evenings under the twinkling lights, sipping hot cocoa with my friends as we watched the colorful festivities on ice.

NewYorkology has the schedule for the snow globe and other winter wonders.