Their scoring system rated 55 parks in terms of sustainable tourism , destination quality , and park management .
National Geographic rated both Everglades National Park and Big Cypress National Preserve the lowest - scoring parks in North America , at 32 out of 100 .
National Geographic 's scoring system rated 55 parks in terms of sustainable tourism , destination quality , and park management .
National Geographic rated both Everglades National Park and Big Cypress National Preserve the lowest - scoring parks in North America , at 32 out of 100 .