The "finely carved" bath averages some two-meters in depth, with independent pools and spillways and a central passage taking water into a drainage duct that divides the room into two small platforms, or "benches" for the Inca, Peru's culture ministry said in a statement.
The Huanuco Pampa archaeological site is part of the Qhapaq Nan project, a complex 25,000-kilometer-long road network that linked Ecuador, Colombia, Peru, Bolivia and Argentina. The road system was declared a World Heritage Site in 2014.