The inn was built in 1903-04 and is a National Historic Landmark. It is made from native materials - rhyolite was used for the foundations and porch pylons, lodgepole pine for the interior and exterior and the wrought iron details were worked on-site. Interestingly, it had electric lights from the beginning (powered by a steam generator), hot water and central heating. Extra wings with additional rooms were added later on.
I can understand your uncle talking about the park for hours - it's that type of place. It's a place of constant change, and scenery that is only found in a few other places in the world. This isn't the first time I've been in the park, but the first time I've been able to spend multiple days, and it was certainly worth it. I want to return againsome day, perhaps in the winter.