Classified for credit

Iowa state park with lake, swimming, and trails — freshwater ecology and outdoor recreation.

Iowa state park with wooded ravines and a lake — freshwater ecology, forest biology, and outdoor physical education.

Small children's zoo with domestic and exotic animals — introduces basic zoology and animal care concepts for early learners.

Dubuque-area nature preserve with interpretive nature center — woodland and stream ecology, native Iowa species, and conservation biology.

Urban nature corridor managed by Iowa State Extension — riparian ecology, native plant restoration, and environmental stewardship in a city setting.

350-acre arboretum with labeled tree collections — covers dendrology, plant taxonomy, and Iowa native ecosystems.

Rural Iowa nature center with twin pond habitats — supports wetland ecology, wildlife observation, and pond biology.

Federally managed prairie wetland refuge — studies waterfowl migration, wetland ecology, and Iowa's glacial pothole landscape.

Municipal botanical park with conservatory and formal gardens — supports plant taxonomy, horticulture, and seasonal ecology observation.

Municipal conservatory and botanical garden in Davenport — covers plant biology, horticulture, and seasonal plant life cycles in a greenhouse setting.

Iowa land trust nature area with prairie and woodland trails — native plant ecology, Iowa biodiversity, and conservation land stewardship.

Urban Iowa state park with wooded trails along Walnut Creek for introductory forest ecology, native flora identification, and outdoor PE.

Wapello County conservation areas with trails and natural lands — covers Iowa native ecosystems, wildlife habitat, and land stewardship.

Iowa environmental education center on the Wapsi River with wetland, prairie, and woodland habitats — structured ecology programming and watershed science for field study.

Iowa state park along the Wapsipinicon River with limestone geology, woodland ecology, and developed trails supporting biology and earth-science study.

Warren County conservation area with managed natural lands supporting Iowa prairie and woodland ecology, wildlife observation, and conservation science.

Iowa loess-hills state park with forested ravines and native prairie — covers landform geology, plant communities, and outdoor physical education.

Linn County nature and learning center with trails and exhibits — covers Iowa ecology, native wildlife, and outdoor environmental education.

Iowa state park featuring a historic grist mill, sandstone formations, and forested river valley — ecology, geology, and 19th-century milling history.

Iowa nature center along the Ocheyedan River corridor — covers prairie and wetland ecology, native species identification, and Iowa watershed biology.

Missouri River island recreation area in western Iowa — supports riparian ecology, Great Plains geography, and outdoor education.

Iowa state forest unit with forested hills, wildlife habitat, and trail access — supports forestry, ecology, and regional geography fieldwork.

Des Moines arboretum with labeled woody plant collections — supports dendrology, plant taxonomy, and seasonal botany curriculum.

Rural Iowa county park with trails and natural areas — limited structured STEM programming; suitable for basic nature observation and outdoor PE.