The Qutub Shahi tombs are centrally located and are only 2 kilometers from the Golconda Fort in the Hyderabad. You can either board a bus from the closest bus depot to you or get down at Golconda Fort Bus Stop. You could hire local transport (auto-rickshaws or private taxis) to reach the Qutub Shahi Tombs.
Timings: 9:30AM to 6:30PM*Note*
You can buy a ticket for your camera/phone and take pictures.
Here are few pictures from Qutub Shahi tombs at the time of sunset.