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Yellowstone National Park
Yellowstone, located in Wyoming, Montana and Idaho, was founded in 1872, making it the country's first national park. In its 2.2 million acres of wilderness, Yellowstone is home to hundreds of species of wildlife and 300 geysers, most notably Old Faithful.

To Do: Go on a hike in the early morning, when animals—including bison, elk and mountain goat—are most likely to be feeding in public view.

To See: Old Faithful, located in the Upper Geyser Basin in south Yellowstone, erupts about every 90 minutes, shooting up to 8,400 gallons of boiling water approximately 150 feet in the air.

To Eat: Seeing Old Faithful once won’t be enough, so enjoy a second (or third, or fourth) viewing over a bite to eat at one of Yellowstone's geyser-side eateries.

To Stay: Make a reservation early to camp out in one of the park's 12 campgrounds.

For more information, visit Yellowstone National Park's official website.

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