3D visualization of the RCW120 region to show the oblate geometry of the molecular cloud. The observers perspective is from the right and the line integrated [C II] map is projected on the left side. The spherical H II region (red) is surrounded by the flat, low-density cloud (green). The clumpy PDR (golden clumps) and the expanding C⁺ bubble (purple) are found in the interface region between H II region and molecular cloud.