Classified for credit

Hawaiian state recreation area on Oahu's windward coast with beach, dunes, and coastal ecology — Pacific island geography and marine biology.

Large national forest in eastern Oregon — supports forest ecology, watershed science, and geographic study of high-desert landscapes.

Large federal wildlife refuge in the high desert — covers migratory bird ecology, wetland biology, and Great Basin geography.

Large California state park in the Santa Monica Mountains — covers chaparral ecology, geology, and watershed biology with ranger-led programs.

Museum in Mammoth Lakes area documenting mammoth fossil discoveries — covers paleontology, Pleistocene megafauna, and Eastern Sierra geological history.

Arkansas state park centered on one of the largest natural springs in the US — covers karst hydrology, spring ecology, and Ozark geography.

Site of two major Civil War battles with NPS visitor center and ranger-led programs — military strategy, Civil War chronology, and Virginia's role in the Confederacy.

FPL-operated manatee observation center where warm-water discharge attracts wild manatees — covers marine mammal biology, thermoregulation, and conservation.

Florida state park with first-magnitude freshwater spring — covers karst geology, aquatic biology, manatee habitat, and spring ecosystems.

NPS park commemorating Manhattan Project sites — covers WWII history, nuclear physics development, and the ethics of science in wartime.

NPS contact station at the Los Alamos Manhattan Project site — nuclear physics history, WWII science policy, and atomic-age ethics.

NPS site at the Hanford nuclear production complex — covers Manhattan Project history, nuclear physics, Cold War policy, and environmental consequences.

Reconstructed Ancestral Puebloan cliff dwellings at Manitou Springs — covers pre-Columbian Southwest archaeology, architecture, and Native American culture.

Open-air living-history village with 25+ historic structures — covers 19th-century Wisconsin pioneer settlement, trades, and daily life.

Rainforest trail in the Ko'olau Mountains — covers Hawaiian ecology, watershed biology, and tropical plant identification.

Aquarium exhibit at SeaWorld featuring manta rays and marine life — marine biology, adaptations, and ocean ecosystem science.

WWII Japanese American incarceration site with NPS visitor center — covers civil liberties, wartime policy, and 20th-century American constitutional history.

Iowa state park with 13 developed limestone caves — covers karst geology, speleology, cave ecosystems, and physical geography through self-guided and ranger programs.

Iowa state park with 13 mapped caves — geology, speleology, and karst landform study with self-guided trails.

Gilded Age Vanderbilt mansion in Newport — covers Gilded Age economics, Beaux-Arts architecture, and the social history of American industrial wealth.

Hands-on children's museum with interactive exhibits — supports early literacy, numeracy, and basic science concepts.

Children's museum loading-dock area — hands-on play-based exhibits supporting early literacy, numeracy, and cooperative social learning.

Historic working observatory honoring astronomer Maria Mitchell — covers observational astronomy, telescope use, and the history of women in science.

Marine mammal rescue and rehabilitation facility — covers marine mammal biology, veterinary science, and coastal conservation.