Not many people realize this when they are driving around Putrajaya, especially near the Prime Minister's office. Try to clear your mind and observe while you are driving, and you will soon realize that you are indeed driving along the potentially largest roundabout in the world. Malaysia Boleh!
The main reason people don't take note is because they tend to think it is just a hill. The circumferential length of this roundabout is approximately 3.4km, and the road that circumvents it is Persiaran Sultan Salahuddin Abdul Aziz Shah.