Ranger's Dormitory - Credit: Wikimedia Commons
The Ranger's Dormitory at the South Rim of Grand Canyon National Park was built in 1920–21. Originally built as a worker's dormitory, it was converted for use by rangers in 1927. The stone building was designed by Daniel Ray Hull of the National Park Service Branch of Plans and Designs, and is a precursor of the later National Park Service Rustic style. Read more on Wikipedia
Source: en.wikipedia.org