Northpark Center in Dallas has a general designated nursing room that offer  a nice chair, a big and spacious diaper changing table, and a sink. 

The room also has an electric outlet by the chair for moms who need to express milk with a breast pump.

Mom Donna wrote: "Actually, there are nursing rooms at Northpark. Near Babystyle. If you're standing at the Babystyle door, facing directly out, go down that wide hall. Before you get to the doors leading to the courtyard and the other part of the mall, you'll see a hallway on your left. Go down that hallway, and you'll see a nursing room. There are family restrooms there as well that have shielded nursing chairs in them."