Pool of Parth

The Pool of Parth is a public water cistern located in the southern part of the Serrapine Quarter, in Torrune's High City. It lies just south of the Hill of Okhtar (where the Archon's palace is situated) and is filled by water carried down that hill's flank in a covered, gutter-like stone chute. However, this water actually originates atop the neighboring Hart's Hill, from the same springs which feed the Carnelian Baths. It is carried across the Tirasval by the Greenstone Span aqueduct, from whence some flows into the palace cisterns and the rest is diverted down the hillsides in stone-lined channels to the Pool of Parth and the Silk Market Cistern. 
As is typical in the city's water system, overflow from the pool runs off via a subterranean drain-channel and is directed into the nearby sewer tunnels to flush waste down to the river.
See also: Water System of Torrune.