After The Challenge veteran player Mark Long brought up the idea to have an all-stars season with cast members who had been with the franchise for years, the idea went viral on social media. It didn't take long for Bunim/Murray Productions, which is behind The Challenge, Road Rules, Bad Girls Club, and other reality TV shows, to jump onboard.

Then, casting began and filming commenced in South America. That's right, if you were wondering about the glittering bodies of water and tall mountains in the background, that's because The Challenge: All Stars Season 1 was filmed in Argentina.

Season 3 will take place in Panama. The Challenge: The Island filmed there once, but in a different location.