The 2.2 million-acre park has 78 kid-friendly attractions.

America’s national parks have long been a favorite for family road trips.

But geology isn’t the only feature that draws kids' attention.

Toddler walking on boardwalk at Yellowstone National Park

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Children can choose their own adventure in geology, hydrothermal, wildlife, history, or preservation.

The study used trail data fromAll Trails, and family travel data fromTripadvisorto come up with its rankings.

For the full list of parks, visitThe Family Vacation Guide.

Family of three hiking on vacation in beautiful Yellowstone National Park along the blue lake

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