Monument Of Vanity.
The Alai Minar is an unfinished tower in the Qutub Complex, construction of which was started by Alauddin Khilji. He decided to constructed a tower which would be twice the height of the Qutub Minar. Construction of the Alai Minar came to a halt in 1316 following the death of Alauddin Khilji. Today the Alai Minar, a massive red rubble structure stands at a height of 2.5 meters.