Mentioned by Busy Tourist
51 Best & Fun Things To Do In Chicago (Illinois)
"With millions of artifacts on display, the Field Museum is one of the largest natural history museums in the world, and it’s renowned for its research and public education efforts as well as its collections that are just plain cool. Gigantic skeletons will show you the jaw-dropping sizes of dinosaurs and woolly mammoths. The hall of gems will beckon you with wondrous colors and glittering edges."