Upon entry into the Cheyenne Mountain complex, visitors and employees are faced with a choice: Which adit, or underground entrance, do they take? The complex features three adits.Click here for the entire Road Trip 2009 package.
June 27, 2009 6:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
Conversation powered by Livefyre