Image courtesy of National Park Service via Guam: A Biogeographic and Maritime Cultural Landscape Exploration of a WWII Amphibious Battlefield. Download largest version (jpg, 3 MB).
Oliva Helinski, from the National Park Service’s Volunteers-in-Parks Program, preparing to collect elevation data of a partially submerged boulder wall in the nearshore waters of the Asan unit of War in the Pacific National Historical Park.