Here are the most important US presidents who preserved America's natural beauty

National parks like Yellowstone and the Grand Canyon preserve the rare, natural beauty of our country.

In recognition, President Barack Obama recently designated three new national monuments in California: the Castle Mountains National Monument, Sand to Snow National Monument, and Mojave Trails National Monument.

We wanted to take a look back in history at the presidents who pioneered some of America's first and most important national parks. You can check them out below:

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