Stellarium is a fabulous free (GPL) multiplatform planetarium software.
Download the landscape zip file to your desktop (no need to decompress it), launch Stellarium, go into the "Sky and viewing options window", select the "Landscape" tab, and "Add/remove landscapes ...".
If this should not work, unzip the landscape you've downloaded (it's a directory), and put it in a sub-directory called "landscapes" in your stellarium user directory. On Mac OS X, this would look like :
More info : Stellarium Wiki
Download : euler_la_silla.zip (9 MB).
This is 4096 x 2048 pixels, higher resolution available upon request.
The 1.2 m Swiss Euler telescope, operated by the University of Geneva, and located at the ESO La Silla Observatory in Chile.
I took the panorama photos at sunrise (7:25 local time) on September 3, 2010. Up there is the ESO 3.6 with HARPS.
Stellarium (left) vs photo (right), 2011/01/03 21:52 local time. Look for a small heap of stones to find the position from where the panorama was taken.