Omega Centauri: This ultimate high-light of the southern sky, here imaged with the STL 11K camera, is never ending to amaze one with its millions of stars.
Two different populations of stars (younger blue ones and older yellowish ones) together  with the recent discovery of a medium sized Black Hole within Omega Centauri seem to indicate that this object was not evolving from a cluster of densely packed stars, but from a dwarf galaxy. This was captured by Milky Way and stripped of many of its stars. But by the mutual exchange of matter also new generations of stars could have been generated.

Have a look at the Hi-Res version to be even more stunned by the tremendous number of stars.

Here is a picture of the core region.