NATIONAL PARK SERVICE FREE MAPS - This map provides a means to select individual parks in order to access links to their respective maps pages. It is a generalized map that leads to more detailed maps. It initially shows the entire geographic area of the National Park Service, from Guam in the western Pacific Ocean to Puerto Rico and the Virgin Islands on the Caribbean Sea, and American Samoa in the South Pacific to Alaska and the Arctic Circle. From there, the user can zoom in to NPS areas marked with bold green labels. Parks are marked by dark green shields, and national trails with lines of varying colors. Clicking on these park units reveals a pop-up with links to the park homepage, their maps page, and a page with digital versions of their print brochure maps.