Design a contemporary public geothermal bathhouse embedded in a basalt canyon. Low terraced volumes of rammed earth, dark timber and translucent glass follow the rugged terrain, while steam drifts through sheltered courtyards, narrow water channels and outdoor pools. Use a wide landscape composition from a slightly elevated eye level with a 28mm lens, establishing a clear procession from foreground water to the central bathing court. Set the scene at blue hour with warm interior glow against basalt black, rust earth, mist gray and amber. Include only a few small adult visitors for scale. Premium photorealistic architectural visualization with believable structure, drainage, material weathering and spatial depth; no signage, logos, text or watermark.