Dubbed "the largest log structure in the world" (surprise... it's not), the Old Faithful Inn has a rich and fascinating history. Soon, the need for real lodging became apparent, and by June of 1904, the Old Faithful Inn welcomed its first guest. Old Faithful Inn - Photo by Mario Tama/Getty Images (2) Old Faithful Inn - Photo by Mario Tama/Getty Images (2)The total cost of building the inn was $165,000. Old Faithful Inn - Photo by Mario Tama/Getty Images Old Faithful Inn - Photo by Mario Tama/Getty ImagesGross earnings for the hotel in its first year were $45,000. At one time, the on-site laundry staff was doing one million pieces of laundry per year at the Old Faithful Inn.