This code shows a new secret area likely to be used for PvE in Rialto. The mode will automatically teleport you to the correct area. Other than that there's no much going on.
The location was found by Zomg
You can also fly around the location in spectator mode to get a better look.
For Workshop creators out there, this location is almost at exactly 2,1,20. Our tools are a bit limited at the moment, but that might help you make something out of this.
This would make for an excellent deathmatch like area.