Outside of Boone, North Carolina is a place called Hawksnest that has Snow Tubing and Zip Lining. Here is a link for a video to see my Friend go down the hill face first: 
The place has multiple lanes to go snow tubing down. Our favorite was lane 4! The other lanes, you get stuck towards the end of the lane, but on lane 4, the tube did not stop till the end. 
Going down the hill picked up good speed. However, because it was about 55 degrees fahrenheit, we were told that the tubes were going down the hill way slower. Here is a video of me going down the hill:
Don't worry, we did not have to drag the tube all the way back up the mountain. Only to the lane, and from the bottom of the lane to a machine called the "Magic Carpet Ride." Here is a link to the video of us riding the Magic Carpet Ride:
Come visit the North Carolina mountains! Stay tuned, I will make a post about our visit to Mystery Hill. Very interesting! I had a great trip and cannot wait to share more.