Iltutmish's mausoleum in Delhi is located at the Qutb complex in Delhi. This site is a UNESCO World Heritage Site and every structure here is incredibly beautiful. In this picture, taken from right above the mausoleum you see the pigeons taking flight over the great emperor's resting place. This is the only sound you might here at the monument on a good day (esp mornings) and it is an incredible feeling to be there and look above to this.