The hall was roughly carved out of one of the old caverns that spider webbed the mountain beneath the city. A massive basin was cut into the floor of the chamber and lined with dark green marble. The basin was filled with water, creating a pool almost the size of a hoofball field. The soft roar of a small artificial waterfall on the far side made the cavern feel almost natural. A few centuries ago it was a bathhouse. Although such social practices had long since been abandoned, the facility still appeared to be well maintained. 