Spitzer RGB image of NGC 6357 (8 |$\mu {\rm m}$| in red, 4.2 |$\mu {\rm m}$| in green, and 3.6 |$\mu {\rm m}$| in blue). The approximate location of several structures are indicated, such as H ii regions in cyan circles and bubbles in white ellipses. The position of the three stellar clusters is also marked (yellow ellipses).