Waterfalls, bison, lakes, rivers, mountains, and geysers: this behemoth national park stretches through Montana, Idaho, and Wyoming
Courtesy of Montana Office of Tourism
Just because you've been hearing about this punctual geyser your whole life doesn't mean that it will be any less awe-inspiring when you see it for the first time...or the 15th time. For well over a century, the dependable Old Faithful has been the most popular geyser in the park, outdoing its higher and larger rivals. On average, it "performs" about every 90 minutes.