Earth's End

Earth's End is an isolated Lowerdark town located 20 miles beneath the surface. The town contains a number of portals and a passageway that lead to the Underchasm. Some of the portals do nothing other than let in light from aboveground and some let in water and fresh air from the Elemental Chaos.
it is said that the Earthsoul Genasi founded the city and that they ventured deep underground to be closer to the spiritual center of the planet. They maintain a portal to the Elemental Plane of Earth, which they use to mine for large gems to trade with other races that dare to venture this deep.
Earthsoul Genasi make up the bulk of the population in the town and made up most of the town guard. The mayor was always a Genasi. There are a few human citizens but they are quite rare, as are most humans this deep in the Underdark. There are also large numbers of Dwarves and Earth Elementals in the town, as well as some Deep Gnomes