Classified for credit

Restored Victorian home of Samuel Clemens with guided tours — covers 19th-century American literary history, social reform, and the life of Mark Twain.

Museum at the C.F. Martin Guitar factory covering instrument-making history, acoustic science, and American craft manufacturing since 1833.

NPS site preserving MLK Jr.'s birthplace and civil rights landmarks — primary-source 20th-century American history and civics.

Major Maryland history museum with collections spanning colonial through 20th-century history — supports Maryland state history and US history curriculum.

AZA-accredited zoo with active conservation programs — covers animal biology, ecology, and wildlife conservation across hundreds of species.

Contemporary art museum occupying a former mattress factory — installation art and site-specific works across multiple floors.

Museum inside a working Chicago River lift bridge — covers hydraulic engineering, bridge mechanics, and the role of the river in urban development.

Preserved antebellum plantation site interpreting enslaved life and the Gullah Geechee heritage — primary-source American history.

Botanical garden and arboretum with outdoor sculpture — covers plant biology, ecology, and landscape design across 158 acres.

AZA-accredited zoo with strong conservation programming — covers zoology, animal behavior, and global habitat and biodiversity.

Meow Wolf immersive art installation — explores narrative art, spatial storytelling, and contemporary mixed-media practice.

Commercially guided cave tour through Ozark caverns — covers speleology, karst geology, stalactite/stalagmite formation, and cave ecology.

Mercedes-Benz factory visitor center covering automotive manufacturing, robotics, and industrial engineering on an active US assembly campus.

Henry Mercer's concrete castle housing pre-industrial tools and trades — early American craft history, archaeology, and material culture.

State history museum in Lansing with exhibits tracing Michigan's development from Indigenous peoples through industrialization and the auto era.

Hands-on science center in Detroit with interactive exhibits covering physics, biology, and engineering across multiple grade levels.

Preserved 1890s steam railroad with excursion rides and restoration shop — covers railroad history, steam mechanics, and the role of rail in American industrial growth.

Mid-Continent Railway Museum with operating steam excursions and restored equipment — covers railroad technology and Midwest industrial history.

Preserved 18th-century rice plantation with formal gardens, working stable yards, and slave quarters — covers colonial agriculture, antebellum history, and landscape history.

Major art museum on the Milwaukee lakefront with a landmark Calatrava-designed pavilion — covers art history from antiquity to contemporary works.

Major children's museum with hands-on exhibits spanning early literacy, math, and science — purpose-built for interactive early-childhood curriculum.

Major state history center in St. Paul with broad exhibits on Minnesota's Native nations, immigration, and 20th-century social history.

Outdoor mining museum with historic equipment and an underground mine tour — covers iron ore extraction, geology, and Minnesota's Iron Range industrial history.

Preserved Cold War Minuteman II ICBM launch facility with ranger-led tours covering nuclear deterrence history and missile technology.