If you have access to a lake or wide and slow-flowing river, RC floatplanes can give you a more challenging and very rewarding radio control flying experience.
Generally speaking, there are two basic types of planes that fly off water. The first being float planes, which are usually converted into wheeled aircraft. The second type is flying boats, which have a boat-like hull.
With the ability to fly off water these planes bring an exciting and new dimension to to flying.