Classified for credit

Indoor aquarium featuring freshwater and marine species — covers aquatic biology, ecosystems, and animal adaptations.

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

Natural history museum at University of Iowa covering paleontology, geology, and biological specimens across Iowa's natural history.

Smithsonian-affiliated museum on the Mississippi River covering river ecology, hydrology, towboat engineering, and the river's role in US history.

Regional science center with hands-on exhibits in physics, technology, and natural science — directly supports STEM curriculum across grade levels.

Museum displaying elaborately hand-carved wooden clocks by Czech immigrant brothers — covers mechanical engineering, horology, and folk craftsmanship.

Restored 1848 Danish windmill with guided tours covering wind energy, gear mechanics, and Danish immigrant heritage.

Center displaying fragments of the 1879 Estherville meteorite fall — covers planetary science, meteoritics, and the geologic record of extraterrestrial impacts.

Working blacksmith shop and wagon museum — covers 19th-century metalworking, mechanical engineering, and agricultural history.

Community museum with a functioning planetarium — covers astronomy, celestial mechanics, and the solar system in a domed projection theater.

Working steam engine museum demonstrating 19th-century mechanical engineering, thermodynamics, and the role of steam power in agricultural history.

Restored 19th-century grist mill with operational millstone machinery — covers mechanical energy transfer, grain milling, and agricultural history.

Museum inside a historic telephone company building — covers the history of telecommunications technology from switchboards to modern systems.