This review is for the gravity zip lining activity. This is one the best things I've ever done! I've never gone zip lining before, but the guides explained everything in great detail and made everyone very comfortable. The first two zips are training lines to get you comfortable with taking the leap (and form). The last four zips are an absolute rush - 1,400, 1,600, 1,800, and 3,100 feet! Zipping through the air at almost 50 miles an hour for over half a mile - wow! This is worth every bit of the cost! There was even beer on the bus back afterward. I have yet to find any other zip lining courses that appeal to me, as they just wouldn't compare to this.