The Naturmobil is a horse-powered vehicle for travel on paved roads. The vehicle is controlled by a driver in a similar way to a motor-driven vehicle, with the horse inside the vehicle on a treadmill. It weighs , or probably around with the horse. It cruises at about , with a top speed of about . The treadmill also charges batteries which will power the vehicle if the horse needs a break.
The vehicle was invented by Abdolhadi Mirhejazi, an Iranian engineer, in 2008. At least one veterinarian, Dr. Matt Pietrak, has concerns for the horse's wellbeing while powering the vehicle.