Preserving the Wonder of our National and State Parks! Join our Volunteer Vacation today... Our National Parks face an $8 billion dollar backlog of conservation and maintenance projects. Since 1987, The Nature Corps has organized hundreds of volunteers to help bridge the gap where government resources are unable to meet the growing need for preservation and rehabilitation of fragile wilderness ecosystems within our National Parks. Dedicated Nature Corps volunteers have created a legacy throughout our western National Parks as they make legendary contributions to protect some of our nation's most valued natural treasures.