Built during the winter of 1903-04, the Old Faithful Inn is one of the few remaining log hotels in the United States. It is a masterpiece of rustic architecture in its stylized design and fine craftsmanship. Its influence on American architecture, particularly park architecture, was immeasurable. The building is a rustic log and wood-frame structure with gigantic proportions: nearly 700 feet (210 m) in length and seven stories high. The lobby of the hotel features a 65-foot (20 m) ceiling, a massive rhyolite fireplace, and railings made of contorted lodgepole pine. Visitor can stand in the middle of the lobby and look up at the exposed structure, or climb up a gnarled log staircase to one of the balconies and look up, down, or across. Wings were added to the hotel in 1915 and 1927, and today there are 327 rooms available to guests in this National Historic Landmark.