This is just a single room with lots of platforms, slopes and other stuff. It's only meant for speedrunning though, as you need to do rocket jumps or grenade jumps just to finish the map. And there are no monsters nor secrets here. All you need to do is collect 8 nailboxes from the warehouse.

Check out this site for awesome speedruns on this map. There are almost as many different routes as there are runs.

This map also won the "Favourite RotW" Nolan Award in 2001.