Butterfly Pavilion (Westminster)

Cheyenne Mountain Zoo (Colorado Springs) — feed giraffes in the country’s only mountainside zoo

Colorado Gators Reptile Park (Mosca) — quirky, fun place with a lot to see

Colorado Wolf and Wildlife Center (Divide)

Denver Museum of Nature and Science (Denver) — nature dioramas

Downtown Aquarium (Denver) — sharks, rays, a tiger, the usual stuff—worthwhile on a day when being outside isn’t attractive

May Natural History Museum (Colorado Springs) — vintage exhibit of colorful and unusual insects

Pueblo Hatchery (Pueblo)

Pueblo Zoo (Pueblo)

Wild Animal Sanctuary (Keenesburg) — big cats

Wildlife Experience (Parker) — University of Colorado museum