This picture was taken looking up to the drilling floor and also seen in the picture is the traveling block. The Drilling floor is the area on the drilling rig where the tools are located to make the connections of the drill pipe and bottom hole assembly. The drill floor is considered the main area where work is performed.
The traveling block is the freely moving section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded (reeved).