Posthip Scott turned up this image of a giant lodge. After some head scratching we have identified it as the Old Faithful Inn. Wikipedia has an article about it. It's quite an amazing structure, especially compared to our modern, energy efficient, buildings constructed out of manufactured materials. This place was made of sticks and stones that were found lying around. Pretty impressive. Wikipedia excerpt:
Initial construction was carried out over the winter of 1903-1904, largely using locally-obtained materials including lodgepole pine and rhyolite stone. When the Old Faithful Inn first opened in the spring of 1904, it boasted electric lights and steam heat.