"Bunkhouse row" at Grant-Kohrs Ranch National Historic Site in Montana is the answer to the Traveler's National Park Mystery Photo 28.
This long, low-strung structure is divided into a series of rooms for the ranch cook; where cowboys would relax after a day on the range with card games, writing letters, or playing music; rooms where they would sleep; a small office; and even some stalls.
One room contains a time-line of U.S. ranching history, stretching from 1817 when Henry Clay introduced Hereford cattle to the country up to 1994, when the North American Free Trade Agreement was adopted.