The Gem Cluster, NGC 3293
NGC 3293 contains nearly 100 mostly white-blue stars and the red supergiant V361 Car.  It is surrounded by a cloud of molecular hydrogen, Gum 30, and a dark nebula. 
NGC 3324 is another cluster with a pulsating red supergiant star, V370 Car, and young, white hot stars formed from the material of the surrounding molecular cloud known as  Gum 31 or IC 2599.