[Answer] This national park was our nation's first and features 2.2 million acres of mountain scenery, animals and endless natural beauty.

Step 1 : Introduction to the question " This national park was our nation's first and features 2.2 million acres of mountain scenery, animals and endless natural beauty. "

...1. Yosemite National Park 2. Yellowstone National Park 3. Grand Teton National Park 4. The Great Smoky Mountains National Park