Monsey, NY is part of the town of Ramapo, New York. It's home to one of the largest Orthodox Jewish communities in the area, and therefore is home to several Kosher supermarkets.
One such example is Evergreen Supermarket, located at 59 NY-59 in Monsey. The company has a second location in Lakewood, NJ. This store looks like one of the more upscale Kosher supermarkets, and it's supplied in part by White Plains, NY-based Krasdale Foods.