The Nanyue King'sTomb
The tomb is of Zhao Mo, the second king of the Nanyue kingdom. It was discovered in 1983. You can actually explore the chambers of the tomb itself.
Zhao Mo was the grandson of fabled Qin general Zhao Tuo, who the emperor sent south to quell unrest here in 214 BC. Instead, he broke away from the Han Dynasty and founded Guangzhou.