Situated within a 450-acre nature reserve in the mountains west of Mexico City, this 700-square-foot bathhouse accompanies a detached residence and artist studio that together comprise an off-the-grid, water-autonomous retreat. Emerging quietly from the densely forested site, the bathhouse and its integrated rainwater harvesting system speak to the retreat’s commitment to designing regeneratively with water in a place where it has become an increasingly scarce resource. Located in the town of Temascaltepec, the name of which is drawn from the pre-Hispanic “temazcal” referring to bathhouses and sweat lodges, the bathhouse connects to an on-site water treatment and storage system supplying 100% of the retreat’s water year-round.