Quwwat-ul-Islam Mosque started construction in 1193 by Qutbuddin to mark his victory over Rajputs. Take note of the fenced Iron Pillar (also see photo below) believed to have "magic lamp" capabilities, i.e. it grants wishes.
Alauddin Khilji's Madrasa - Madrasa is arabic term for any educational institution. Khilji was the second Sultan of Delhi from Khilji dynasty, who ruled from 1296 to 1316 AD.
Ticket booth at the Qutub Minar: 250 rupees for foreigners, 10 rupees for locals, 25 rupees for cameras, 5 rupees for the use of the cloak room (However, the cloak room minders will further ask for "donations", as if 250 rupees wasn't adequate for at least a storage space).