The earliest settlers were mostly immigrants from Ireland, Germany, and Scandinavian countries. Because the land of Fort Sheridan and other sections of the Bluff Coast had steep ravines and thriving forests that would have been difficult to clear, the settlers in the mid-1800s never considered the land useful for farming. As a result, the Fort Sheridan site was never plowed, unlike much of the rest of Illinois.
In the late 1800s, wealthy families sought out the lake bluffs and began to build country-style estates in such areas as Lake Forest and Highland Park. Some estates were occupied year-round, while others were used as summer homes. The scenic bluffs overlooking Lake Michigan are still regarded as choice real estate and provide an example of how geology and nature can influence development.

