Notes:
Cerro Tololo is located at[lat,lon] = [-30.23,-70.72] The Gemini South and SOAR telescopes are located on peak called Cerro Pachon just to the SE.
The European Southern Observatory is at La Silla: [lat,lon] = [-29.25,-70.73] and the Very Large Telescope (VLT) to the north in Paranal: [lat,lon] = [-24.63,-70.40].