I did a web search with AltaVista and it gave 5 hits to 'aurora;monument'. One of these turned up an Aurora FAQ page with exactly this question. There seem to be two 'monuments' one on the road outside the Fairbanks International Airport and the other at the 'Northern Lights Tower and Interpretive Center' in Rugby North Dakota.
All answers are provided by Dr. Sten Odenwald (Raytheon STX) for the
NASA IMAGE/POETRY project.