The Prada Art Installation, found thirty miles from the Artist Colony in Marfa, does exist as stated in the episode, and in a very desolate part of Texas.
Grampa kissed a nurse in Times Square, is a reference to a Life Magazine photograph after hostilities ended with Imperial Japan at the end of the Second World War (also known as V-J day). It was an American sailor George Mendonsa kissing Greta Zimmer Friedman in Times Square in 1945.
"Lawn Darts" was one of the items that were banned for children's use as portrayed in the test lab, it had "jagged corners".
The Simpson's mortgage company is "Up to Your Eyeballs Mortgage Company"