From Wikipedia: "Omega Centauri ( NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in...
NGC 6752, a.k.a Cadwell 93 or Great Peacock Globular. Fourth brightest and one of the most closest globular cluster in the sky ~13000 light-years away in Pavo. The core region is densel...