Two men working at a re-fueling construction site when they noticed what they thought was a "tent" placed on an elevated surface overlooking a parking lot. The tent appeared to be illuminated from the interior. As this was in no way unusual the two men began to attend to the night's work. As the men moved one of the diesel trucks towards the gate entrance they were surprised to see that the vehicles light reflected off the tent. Very surprised and puzzled when the realized that the supposed tent was an apparent metallic object they temporarily ceased their re-fuelling activities drove down to the entrance gate and parked. Exiting the truck one picked up a tire iron, the other a thick piece of wood. However the men weren't able to explain why they did that as no discussion took place. They both cautiously climbed up the sloping and uneven rock surface towards the "tent" that had attracted their attention. When they got to within 25 -30 ft of the object several things suddenly happened. Just as they became aware that they were looking at a craft of some kind. It was about 15 ft in diameter, 8 ft high, flat on top and had a dome and appeared to be about 4 ft off the ground. It was totally silent. What also held their attention was a black ball that moved around the interior of the dome at a dizzying speed. The two men also had the impression that "people" were walking around inside the craft. As they attempted to take all this in, and at the same time seek a rational explanation, they were suddenly startled by a loud foghorn type sound that halted them in their tracks and clearly implanted the instruction to "stop" in their minds. Without any exchange of conversation they both immediately dropped the weapons they had been carrying turned around and calmly walked back to the diesel truck. The foghorn continued to sound loudly every 4 seconds but they still had no accompanying sense of fear. Only upon re-entering the truck did an acute sense of fear overcome them, whereupon they voiced an unanimous "let's get out of here" and promptly drove back down the mountain to their base without stopping at the obligatory additional sites to complete the night's work

Google map of this location.