The vast open world of Forza Horizon 3 is full of hidden roads and subtle easter eggs for keen-eyed players:

- Uncharted Roads: Many small dirt tracks, shortcuts, and hidden paths don't appear on the main map until you drive on them. Exploring off-road is often rewarded with XP boards or simply a beautiful view. The 'Roads Discovered' statistic tracks your progress.
- The 'Top Gear' Test Track: While not officially labeled, a section of the map in the Outback bears a striking resemblance to the famous Top Gear test track, complete with a 'Gambon' corner. It's a fun spot to test your cars.
- Halo Warthog: The iconic M12S Warthog CST from the Halo series is a drivable vehicle in Forza Horizon 3. It was initially a reward for playing Halo 5: Guardians or Halo: The Master Chief Collection, but can also be won through Wheelspins or purchased from the Auction House.
- Forza Horizon 2 References: Keep an eye out for subtle nods to the previous game, such as festival banners or radio chatter.
- Real-World Landmarks: Many locations in the game are inspired by real Australian landmarks, offering a virtual tour of the country.
Take the time to explore every nook and cranny of the map; you never know what you might find!