That contraption kind of reminds me of the Rail Explorers at the Nevada Southern Railway Museum in Boulder City, Nevada (near Las Vegas). Basically, you have 2 to 4 people on a pedal-powered rail vehicle and you pedal down the tracks for a while. Then you have a quick meal at the end of the ride at an outside eating area. Then the train takes you back to the museum. It's a lot of fun, and it's great exercise.