The Qutb Shahi Tombs are located in Hyderabad, India, a city of 8 million people. The tombs were originally constructed during the Qutb Shai dynasty in the 14th and 15th century. They were initially restored in the 1800s, with some restoration continuing.
With one central tomb, there are numerous ones surrounding it. For those interested in more details I suggest using the wiki page as it describes each in detail
For those not interested in reading the photos give a good overview of them.