<P> Close - up of balcony </P> <Li> <P> Smith's cupola (foreground, right), with the Tomb of Imam Zamin, Alai Darwaza, and Qutb Minar in background </P> </Li> <P> Smith's cupola (foreground, right), with the Tomb of Imam Zamin, Alai Darwaza, and Qutb Minar in background </P>

What makes the qutub minar the most unique structure of its kind