Dome City is a city housed under a dome built by the People of P3R-118 to protect themselves, while the planet goes through an ice age. The city is relatively advanced, and is divided into two social groups. The group of miners knew nothing about the city above them because of implanted Memory Stamps. The people in the city where living luxurious and civilized. They grow their own food in greenhouses. (SG1: "Beneath the Surface")