It became the 29th U.S. national park in 1956, when Laurence Rockefeller visited the area and thought the land was incredibly beautiful.

Although most U.S. national parks preserve unique geographic features, Everglades National Park was the first created to protect a fragile ecosystem.

He has partnered with the National Park Service and the California Library of Natural Sounds to document the various sounds heard in U.S. parks.

Located an hour's drive from Minneapolis-Saint Paul, Interstate Park has received annual visitation comparable to many U.S. national parks since the 1930s.

Also, it is illegal to remove minerals from within a U.S. national park.

Unlike most U.S. national parks, Everglades National Park was created to protect a fragile ecosystem instead of safeguarding a unique geographic feature.

The use of Wagbags and the removal of outhouses is part of a larger trend in U.S. parks.

There are some 725 million annual visits to the country's state parks, compared to 276 million to U.S. national parks.

Many U.S. national parks have discussed or enacted roadless rules and partial or total bans on ORVs.

It was established in 1890 as the second U.S. national park, after Yellowstone National Park.