Bath Room, Undermount Tub, and Open Shower The bathroom is poured-in-place concrete surfaced in laja stone, a local material chosen by the architect to evoke the region’s thermal baths. The space opens to a private garden via two doors—one in the shower, the other behind the toilet. The shower fittings are from Paini.  Photo 2 of 4 in This Chilean House Recreates the Hot Spring Experience with a Super Luxurious Stone Tub