Upon entering Dennis Hill park, John and Adam immediately felt that they were being watched from the woods surrounding the park. As they drove up the road leading to the structure on the top of the hill, they could feel a strong presence in the trees on either side of the road. Once they got to the top they made tow circuits around the building. A strong presence was emanating from the trees on the south side of the structure. Once their eyes adjusted to the darkness they could see the building outlined against the sky. Occasionally they could see shadows flitting around the structure, sometimes around the foundation and bushes, and two or three times on the observation deck. They then pulled the car into the carport of the building. In the fireplace there was the embers of a dying fire. Sometime in the last 2-3 hours someone had been to the park and had used the fireplace. They then drove back to the driveway the circles the building. Parking the car there and shutting off the lights they sat and observed the building. Again they could occasionally see shadows around the building. Unfortunately they did not get much on film because they had the windows of the car up and the inferred emitters for the camera on, thus they just got reflections off the windows and could not see much outside the car when they later reviewed the tape. Adam said that for a few minutes that he could see little green orbs streaking threw the center of the car. John was unable to see them. They both did however feel strong PKE emanations from the building and the tree line around the structure. They sat in the car and observed the area for another ten to fifteen minutes. Then they made two more circuits around the building using the spotlight to illuminate the structure. After completing their rounds they parked the car again and watched the building and surrounding area. After another five minutes John got an impression of someone (or something) saying to leave. He felt that this was a friendly gesture, but forceful as well. On the way down the driveway they again felt that they were being watched by unseen eyes. The drive home was uneventful.