This card shows the original building for the Fort Bridger State Museum, housed at the time in the Old Store building. In the foreground is a lone chimney, likely a remnant of a building that was moved to another location without the chimney.
The site has been extensively renovated and developed as a major historic site since these pictures were taken, so the museum is now in a larger building nearby.
There is no additional description on the back of the card, but other cards in this series point to this being from the 1950s.