This fort is one of the best forts of asia and is number one fort in india located in delhi, india. the major builders of india, one of which was shah jahan from mughal dynasty built this with red sandstone and the stones were very light and attractive . it took 25 years to built just half part and in other 10 years, it was ready to reach great heights among other forts in whole asia . it is there in middle of the city surrounded by a moat with crocodiles .