Dripstones

The Dripstones are a series of interconnected caverns in the Underdark that all share one principle feature. The roofs of these caverns are covered in limestone stalactites of varying sizes. Water from above continually drips from these structures to the ground, causing a small underground lake and river. It is because of this feature that the Dripstones get their name.
The Dripstones are currently inhabited by a tribe of Minotaur, led by The Minotaur King (Male Minotaur Barbarian 6 / Reaping Mauler 5). The tribe consists of roughly fifty or sixty Minotaurs. Since settling in the Dripstones in 1,120, the tribe has settled down and turned away from their wandering ways.
The Dripstone Minotaurs do not have a city per se, or even a settlement within the Dripstones. They simply live in the caverns. Periodically, the Minotaur led raids on nearby settlements in the Underdark, or sometimes even on the surface world.