Like most hovercraft, the Volkswagen Aqua uses more than one engine. The primary motor, which is powered by a hydrogen fuel cell, is used to drive the main fan which inflates the skirt around the vehicle and raises the Aqua just above the ground. The fans at the rear of the vehicle are powered by individual electric motors to provide forward thrust and directional control. The styling of the Volkswagen Aqua is extremely clean and simple. There's very little clutter to the lines, except perhaps at the rear due to the quartet of fans. The interior has room for two people, and features a similar minimalist vibe as the exterior. Perhaps our only area of concern is with how you actually enter the vehicle. See that small round hatch at the rear of the vehicle, the one located where the rear window would normally be? That's your one and only door."