Qutab Minar is a must-visit for those who love to read about history. Built in red sandstone, it still is one of the most popular tourist destination. It is open from 6am to 6pm everyday. Fortunately I had visited before 1981 before it was closed down. So climbing to the topmost storey is forbidden but nevertheless it is a must-visit. Children love to visit and play in the lush green garden which surrounds this monument. This monument is declared a World Heritage Site by UNESCO.