Rex's Diner is a diner located just across the street from Davis Quartz in Blaine County, San Andreas. It is a purple and green colored restaurant, named after a large purple dinosaur eating a hotdog located to the western side of the diner. This T-Rex, which seems to be the restaurant's mascot, could be based on the real life Cabazon Dinosaurs in Southern California. Behind the restaurant are some unused containers, oil tanks, and trailers. The restaurant is inaccessible to the player and plays no role in the storyline whatsoever.
- The purple dinosaur resembles the iconic Novac dinosaur from the game Fallout: New Vegas or Barney from a 1980s or 1990s show. Both dinosaurs are holding something, overlooking a major highway, and are near quarries. Both dinosaurs are based on the Cabazon Dinosaurs, although the Novac dinosaur is in Nevada.