Old Faithful Inn
Credit: Robert Alexander / Getty Images

Opened in 1904, Old Faithful Inn is the world's largest log structure. Made from some of the park's most towering lodgepole pines and volcanic rhyolite – for the chimney – the historic lodge sits at the edge of Yellowstone National Park's Upper Geyser Basin, where the geyser the pristine institution is named for spouts off on a (somewhat) regular basis. The lodge tends to be packed in the summer, but it's at its most beautiful in the winter, when it is invariably wrapped in a thick blanket of steam. [From $120 per night; yellowstonenationalparklodges.com]