What is this awesome admin sit?

I was on this server using rp_downtown_v4c and when I came into admin sit I was teleported into a thing outside of the map where they had placed props and stuff, it was in the middle of the sky basically, but out of map? Please help me find this! (Dont bully me its not DarkRP related)

It could just be in the 3D skybox. Otherwise, they could have used an addon that carves out an area with stencils

Yea I found one called “Safe Space” and required “Doors” addon, but it spammed me with errors.