If you were referring to the literal horizon or other media:
: You can visit the ruins of the Mile High Stadium (known in-game as Devil's Grief) and the Colorado Springs area. hoyynrizip
The game is set in a future version of the United States where nature and machines have reclaimed civilization. You can find "Vantages"—data points that reveal what the world looked like before the collapse: If you were referring to the literal horizon
: There is a massive four-part film project titled Horizon: An American Saga , which Costner self-funded and directed as a "passion project". hoyynrizip