The City of the Dead is a massive above-ground necropolis that has a squatter population numbering in the hundreds of thousands. Many of the houses there are actually mausoleums that have been emptied of their previous occupants. I first encountered The City of the Dead on my trip to the Sunday Market. You can ask your hotel reception to write out the name of the Sunday Market in Arabic for the taxi driver. The receptionist will probably, as happened with me, try to convince you not to go. Don't listen. The Sunday Market is a pretty intense, but worthwhile, experience. It's massive. People are selling everything from trinkets, to fake designer goods, to snakes, to camels.