During the scene in the Texas airport, Dean Stockwell's character is on the phone with his wife. The PA announcer can be heard saying "A message for Joy Stockwell, Joy Stockwell. Austin will arrive at any minute." Joy was Dean's wife and Austin, his son, was born during production of this film.
The restaurant that Travis calls Walt's home from is actually located in Cabazon, CA (not San Bernardino, which is about 45 miles away.) This of course is home to Claude Bell's famous concrete T-Rex and brontosaurus.
Musician Kurt Cobain claimed this was his favorite movie of all time