In 1997, excavations at the Siq revealed a large relief carving of camels carrying merchandise on its southern and western walls. The two reliefs are located at the major bend in the road, roughly halfway through the Siq. The reliefs depict drovers leading camels, one carved into the south wall east of the corner and one on the west wall after the road turns north.  The reliefs, among the largest ancient sculptures, measure 3.5 meters in height, with the uphill relief measuring 9.5 meters and the downhill relief measuring 10.3 meters.  They are among Petra's earliest surviving relief sculptures, dating back to before the Siq's paving in 50 BCE. The drovers are dressed in woolen trousers and strapped sandals, and they each carry a stick in their bent left arms. The southern relief's front drover is well preserved, wearing a tunic or skirt that reaches mid-shin and symmetrical folds flowing towards his right foot. The two groups approach each other, and two rock-cut cultic niches are situated in the corner space between them.

The sculptures are older than the water channel behind them. This relief of camels and their drivers emphasizes the kingdom's reliance on trade.