Qutb Minar and it's monument's in Delhi is amazing although there has been some canges over the years for example you can't try to put your hands on the Iron Pillar beacause theres a gate around it. But the rewrds are amazing it's basiclly a complex so expect 1hour-1 and a half hour to explore the whole thing. The admission price for this monument is as falows,250 Rupees for all adults, children are free.