We've previously featured Garden of Eyes' modding work before, they're also among the modders accountable for Elden Ring Runes digging through the game's code and revealing the location of "three doors that aren't openable in the colosseum," that many are thinking could be the basis of an update that will be released in the near future.
YouTuber Garden of Eyes wasn't the first to release a video about these hidden locations however, their video provides a lot of detail on the coliseums of Leyndell, Northern Limgrave, and Caelid. Each of these locations is completely constructed and have colliders that determine the extent to which your character is able to slide through certain objects.
The Wall