FLying in circles is bad... Landing in circles, on the other hand...

We know additional airports are difficult to build, and are the mercy of wind directions and speeds when it comes to takeoffs and landings. Limit to their capacity can also cause delays. The Endless Runway Circular Airport is a new concept that would use a circular, 3.5 km banked runway to ensure planes always land and take off with a headwind. Big enough to fit even a major hub airport inside, it would also take up less space than some conventional layouts, allow up to three planes to take off or land at once, and seamlessly adjust to the conditions outside without needing to make runway changes.

Read about the project here... and check out BBC's article here...