The drinking water supply system at Baños de la Reina was built in the 1st century AD.
A wooden waterwheel, measuring more than 8 m high, captured fresh water from the water table and conducted it to four large basins located next to house 2, carved into the rock and connected to each other by means of lead pipes.
This mechanism was used to raise the water to the tanks located next to it, where it was stored to supply the town and its thermal baths.
For maintenance and cleaning purposes, a partially underground staircase was carved out to access the water collection area, with four lateral vaults, two of which had benches attached to them. Also outside house 1, wells were drilled and a large cistern was built, both fed by the same aquifer.