The greatest ruins in Qadira lie deep in the desert and are often inaccessible when dunes cover them. The one exception is the oasis of Al-Bashir, which lies at the center of many stone walls beneath a towering cliff at the feet of a Zho escarpment where the River Pashman touches those heights. This city is avoided by caravans heading to Katheer from all points east, for it is home to a roosting colony of hundreds of harpies, whose songs bring herds of antelopes and entire camel trains to ruin. The treasure piled up at its heart is also rumored to be immense, although no one has found a way to slay enough harpies to make it possible to carry it home. The satrap has tried to clear the ruins several times with small armies, but he accomplished only the creation of a new generation of widows. For now, he saves his strength.
Sources: Pathfinder Chronicles Campaign Setting