Aknaptholis

Pronounced: ak-NAFF-a-lis
It is located on the Southern edge of The Great Worm Dune Sea along an old (dead) river valley through a lengthy gorge which bisects the entire site.
The place appears lush and green, early explorers did not return from there.  Higher level more trained explorers have determined the lush green is an illusion.  Divinations have revealed the place is dangerous.
The Valley of Kings is an offset area of Pyramids rumored to hold vast treasures and the their tombs.
The Grand Kabath, also offset from the city, is built into the side of small series of rugged hills.  This is the tomb of the greatest King of Aknaptholis.