There are two Easter eggs involving A Volkswagen Beetle and a mini cooper. To find the Mini Cooper Easter egg, go to the farm map and inside the house that you spawn on the porch of. Then go to the kitchen where you will find a pair of ovens. Look behind the ovens and you will see a button. Shoot the button and you will be teleported to a sewer like room with a red Mini Cooper. And to find the Volkswagen Beetle Easter Egg, go to the map with a small highway and go all the way to the end of the highway. There you will find a vent. Break the ventilation cover and crawl inside, after a bit of crawling, you will find a small room housing a Beige Volkswagen Beetle. Ive yet to uncover any other Easter Eggs on this map except the Nissan GTR one but there is already a discussion about that. Happy Easter egg hunting!